:root {
    color-scheme: light;

    /* Light Theme Palette (Default) */
    --background: #FAFAF8;
    --background-cool: #F7F8FA;
    --surface: #FFFFFF;
    --surface-muted: #F4F4F1;
    --surface-raised: #FFFFFF;
    --surface-inset: #F1F1EE;

    --border: #E6E4DE;
    --border-strong: #D4D0C7;
    --border-subtle: #EFEEE9;

    --text-primary: #111111;
    --text-secondary: #55524C;
    --text-muted: #8A867C;
    --text-disabled: #AAA69C;
    --text-inverse: #FFFFFF;

    --primary: #111111;
    --primary-hover: #2A2A2A;
    --primary-active: #000000;

    --accent: #635BFF;
    --accent-hover: #574FE8;
    --accent-soft: #EFEEFF;
    --accent-strong: #4F46E5;

    --success: #16A34A;
    --success-soft: #DCFCE7;
    --warning: #F59E0B;
    --warning-soft: #FEF3C7;
    --danger: #DC2626;
    --danger-soft: #FEE2E2;
    --info: #0284C7;
    --info-soft: #E0F2FE;

    --code-bg: #0B0D10;
    --code-border: #24272E;
    --code-text: #F7F7F5;

    --ai-thinking: #D8C6FF;
    --ai-searching: #BDEBFF;
    --ai-reading: #C7E9D0;
    --ai-running: #FFE3B0;
    --ai-writing: #FFD0E1;
    --ai-done: #DCFCE7;

    --gradient-primary: linear-gradient(135deg, #635BFF 0%, #8B5CF6 45%, #06B6D4 100%);
    --gradient-cool: linear-gradient(135deg, #06B6D4 0%, #635BFF 55%, #111827 100%);
    --gradient-warm: linear-gradient(135deg, #FF7A59 0%, #F59E0B 50%, #FDE68A 100%);
    --gradient-subtle-light: radial-gradient(circle at 20% 10%, rgba(99, 91, 255, .14), transparent 34%), radial-gradient(circle at 80% 0%, rgba(6, 182, 212, .12), transparent 30%);
    --gradient-subtle-dark: radial-gradient(circle at 20% 10%, rgba(139, 124, 255, .22), transparent 34%), radial-gradient(circle at 80% 0%, rgba(6, 182, 212, .16), transparent 30%);
    --gradient-mesh-soft: radial-gradient(circle at 10% 20%, rgba(99, 91, 255, .16), transparent 28%), radial-gradient(circle at 70% 0%, rgba(6, 182, 212, .14), transparent 32%), radial-gradient(circle at 90% 55%, rgba(245, 158, 11, .10), transparent 28%);

    --gradient-subtle: var(--gradient-subtle-light);

    --shadow-xs: 0 1px 2px rgba(0, 0, 0, .05);
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, .06);
    --shadow-md: 0 12px 32px rgba(0, 0, 0, .10);
    --shadow-lg: 0 24px 80px rgba(0, 0, 0, .16);
    --shadow-stack: 0 1px 1px rgba(0, 0, 0, .04), 0 8px 24px rgba(0, 0, 0, .08);
    --shadow-glow: 0 0 48px rgba(99, 91, 255, .24);

    /* Shared Tokens */
    --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-mono: "JetBrains Mono", "SF Mono", Consolas, "Liberation Mono", monospace;
    --font-display: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

    --space-0: 0;
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;
    --space-24: 96px;
    --space-32: 128px;
    --space-40: 160px;

    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-2xl: 28px;
    --radius-full: 999px;

    --motion-fast: 100ms;
    --motion-base: 160ms;
    --motion-slow: 240ms;
    --motion-page: 360ms;
    --ease-standard: cubic-bezier(.2, .8, .2, 1);
    --ease-out: cubic-bezier(.16, 1, .3, 1);
    --ease-in-out: cubic-bezier(.65, 0, .35, 1);

    --container-xs: 560px;
    --container-sm: 720px;
    --container-md: 960px;
    --container-lg: 1180px;
    --container-xl: 1320px;
    --container-2xl: 1440px;
    --container-full: 100%;
}

/* System Dark Mode & Explicit Dark Theme Override */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        color-scheme: dark;

        --background: #08090A;
        --background-cool: #090B0F;
        --surface: #111214;
        --surface-muted: #181A1D;
        --surface-raised: #1D1F23;
        --surface-inset: #0D0F12;

        --border: #2A2D33;
        --border-strong: #3A3F47;
        --border-subtle: #202329;

        --text-primary: #F7F7F5;
        --text-secondary: #B7B8BC;
        --text-muted: #7D828A;
        --text-disabled: #5F656E;
        --text-inverse: #111111;

        --primary: #FFFFFF;
        --primary-hover: #EDEDED;
        --primary-active: #DADADA;

        --accent: #8B7CFF;
        --accent-hover: #A799FF;
        --accent-soft: #1D1A3D;
        --accent-strong: #A799FF;

        --success: #22C55E;
        --success-soft: #0F2E1A;
        --warning: #FBBF24;
        --warning-soft: #3A2A0A;
        --danger: #F87171;
        --danger-soft: #3A1212;
        --info: #38BDF8;
        --info-soft: #082F49;

        --code-bg: #0B0D10;
        --code-border: #24272E;
        --code-text: #F7F7F5;

        --gradient-subtle: var(--gradient-subtle-dark);

        --shadow-xs: 0 1px 2px rgba(0, 0, 0, .22);
        --shadow-sm: 0 4px 12px rgba(0, 0, 0, .28);
        --shadow-md: 0 12px 32px rgba(0, 0, 0, .36);
        --shadow-lg: 0 24px 80px rgba(0, 0, 0, .48);
        --shadow-stack: 0 1px 1px rgba(0, 0, 0, .35), 0 8px 24px rgba(0, 0, 0, .42);
        --shadow-glow: 0 0 56px rgba(139, 124, 255, .30);
    }
}

[data-theme="dark"] {
    color-scheme: dark;

    --background: #08090A;
    --background-cool: #090B0F;
    --surface: #111214;
    --surface-muted: #181A1D;
    --surface-raised: #1D1F23;
    --surface-inset: #0D0F12;

    --border: #2A2D33;
    --border-strong: #3A3F47;
    --border-subtle: #202329;

    --text-primary: #F7F7F5;
    --text-secondary: #B7B8BC;
    --text-muted: #7D828A;
    --text-disabled: #5F656E;
    --text-inverse: #111111;

    --primary: #FFFFFF;
    --primary-hover: #EDEDED;
    --primary-active: #DADADA;

    --accent: #8B7CFF;
    --accent-hover: #A799FF;
    --accent-soft: #1D1A3D;
    --accent-strong: #A799FF;

    --success: #22C55E;
    --success-soft: #0F2E1A;
    --warning: #FBBF24;
    --warning-soft: #3A2A0A;
    --danger: #F87171;
    --danger-soft: #3A1212;
    --info: #38BDF8;
    --info-soft: #082F49;

    --code-bg: #0B0D10;
    --code-border: #24272E;
    --code-text: #F7F7F5;

    --gradient-subtle: var(--gradient-subtle-dark);

    --shadow-xs: 0 1px 2px rgba(0, 0, 0, .22);
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, .28);
    --shadow-md: 0 12px 32px rgba(0, 0, 0, .36);
    --shadow-lg: 0 24px 80px rgba(0, 0, 0, .48);
    --shadow-stack: 0 1px 1px rgba(0, 0, 0, .35), 0 8px 24px rgba(0, 0, 0, .42);
    --shadow-glow: 0 0 56px rgba(139, 124, 255, .30);
}

/* ========================================
   RESET & BASE STYLES
   ======================================== */

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    background-color: var(--background);
    background-image: var(--gradient-subtle);
    background-attachment: fixed;
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-12) 0;
}

.container {
    max-width: none;
    margin: 0 auto;
    padding: 0;
    width: 95%;
}

/* ========================================
   TYPOGRAPHY
   ======================================== */

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--text-primary);
    line-height: 1.1;
    font-weight: 700;
    letter-spacing: -0.035em;
}

h1 {
    font-size: 56px;
    letter-spacing: -0.055em;
    margin-bottom: var(--space-5);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: 36px;
    margin-top: var(--space-16);
    margin-bottom: var(--space-8);
    border-bottom: 1px solid var(--border);
    padding-bottom: var(--space-4);
}

h3 {
    font-size: 28px;
    margin-top: var(--space-10);
    margin-bottom: var(--space-4);
}

h4 {
    font-size: 22px;
    margin-bottom: var(--space-3);
}

p {
    margin-bottom: var(--space-4);
    color: var(--text-secondary);
    line-height: 1.65;
    letter-spacing: -0.01em;
}

a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--motion-base) var(--ease-standard);
}

a:hover {
    color: var(--accent-strong);
    opacity: 0.9;
}

code {
    font-family: var(--font-mono);
    font-size: 13px;
    background: var(--surface-inset);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-xs);
    color: var(--text-primary);
}

pre {
    background: var(--code-bg);
    color: var(--code-text);
    border: 1px solid var(--code-border);
    border-radius: var(--radius-lg);
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.6;
    padding: var(--space-4);
    overflow-x: auto;
    margin: var(--space-4) 0;
}

pre code {
    background: none;
    padding: 0;
    color: inherit;
}

/* ========================================
   LISTS & CONTENT
   ======================================== */

ul,
ol {
    padding-left: var(--space-6);
    margin-bottom: var(--space-4);
}

li {
    margin-bottom: var(--space-2);
    color: var(--text-secondary);
}

li>ul,
li>ol {
    margin-top: var(--space-2);
    margin-bottom: var(--space-2);
}

/* ========================================
   FORMS & INPUTS
   ======================================== */

.input {
    height: 40px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0 var(--space-3);
    font-size: 14px;
    color: var(--text-primary);
    width: 100%;
    outline: none;
    transition: all var(--motion-base) var(--ease-standard);
}

.input::placeholder {
    color: var(--text-muted);
}

.input:hover {
    border-color: var(--border-strong);
}

.input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-soft);
}

.input:disabled {
    background: var(--surface-muted);
    color: var(--text-muted);
    pointer-events: none;
}

.input.error {
    border-color: var(--danger);
    background: var(--danger-soft);
}

.textarea {
    min-height: 112px;
    padding: var(--space-3);
    resize: vertical;
    line-height: 1.5;
}

/* ========================================
   BUTTONS
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    padding: 0 var(--space-4);
    height: 40px;
    cursor: pointer;
    transition: all var(--motion-base) var(--ease-standard);
    border: 1px solid transparent;
    gap: var(--space-2);
    text-decoration: none;
    white-space: nowrap;
    user-select: none;
}

.btn:active {
    transform: scale(0.98);
}

.btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.btn:disabled {
    opacity: 0.45;
    pointer-events: none;
    box-shadow: none;
}

.btn-primary {
    background: var(--primary);
    color: var(--text-inverse);
    border-color: var(--primary);
    box-shadow: var(--shadow-xs);
}

.btn-primary:hover {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
}

.btn-secondary {
    background: var(--surface);
    color: var(--text-primary);
    border-color: var(--border);
}

.btn-secondary:hover {
    background: var(--surface-muted);
    border-color: var(--border-strong);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    background: var(--surface-muted);
    color: var(--text-primary);
}

.btn-danger {
    background: var(--danger);
    color: #FFFFFF;
    border-color: var(--danger);
}

.btn-danger:hover {
    opacity: 0.9;
}

/* ========================================
   CARDS & SECTIONS
   ======================================== */

.section-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    margin: var(--space-10) 0;
    box-shadow: var(--shadow-xs);
    transition: all var(--motion-base) var(--ease-standard);
    position: relative;
    overflow: hidden;
}

.section-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0.6;
}

.section-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.section-card h3 {
    margin-top: 0;
    color: var(--text-primary);
    font-size: 24px;
    margin-bottom: var(--space-4);
}

section {
    width: 100%;
    margin-bottom: var(--space-20);
}

section h2 {
    text-align: center;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border);
    padding-bottom: var(--space-4);
    margin-bottom: var(--space-12);
}

/* ========================================
   HEADER & NAVIGATION
   ======================================== */

header.main-header {
    background-color: color-mix(in srgb, var(--background) 80%, transparent);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    padding: var(--space-4) 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    width: 100%;
    height: 64px;
    display: flex;
    align-items: center;
}

nav.main-nav ul {
    list-style: none;
    display: flex;
    gap: var(--space-8);
    margin: 0;
    justify-content: center;
    flex-wrap: wrap;
}

nav.main-nav a {
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 14px;
    transition: color var(--motion-base) var(--ease-standard);
    text-decoration: none;
}

nav.main-nav a:hover,
nav.main-nav a.active {
    color: var(--accent);
}

/* ========================================
   HERO SECTION
   ======================================== */

.hero {
    padding: var(--space-20) var(--space-6);
    text-align: center;
    margin-bottom: var(--space-20);
    width: 100%;
}

.hero h1 {
    margin-top: 0;
    margin-bottom: var(--space-5);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 18px;
    line-height: 1.65;
    max-width: 720px;
    margin: 0 auto var(--space-8);
}

.hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    justify-content: center;
    margin-top: var(--space-6);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    padding: var(--space-2) var(--space-4);
    color: var(--text-primary);
    background: var(--surface-muted);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ========================================
   GRID LAYOUTS & COMPONENT CARDS
   ======================================== */

.audience-grid,
.metric-grid,
.trace-grid,
.arch-grid,
.skill-grid,
.icon-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
    margin: var(--space-8) 0;
}

.audience-card,
.metric-card,
.trace-card,
.arch-card,
.skill-card,
.icon-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    box-shadow: var(--shadow-xs);
    transition: all var(--motion-base) var(--ease-standard);
    display: flex;
    flex-direction: column;
}

.audience-card:hover,
.metric-card:hover,
.trace-card:hover,
.arch-card:hover,
.skill-card:hover,
.icon-card:hover {
    border-color: var(--border-strong);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.audience-label {
    display: inline-block;
    margin-bottom: var(--space-4);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent);
    font-weight: 700;
}

.audience-card h3,
.metric-card h3,
.arch-card h3,
.skill-card h4 {
    margin-top: 0;
    color: var(--text-primary);
    font-size: 20px;
    margin-bottom: var(--space-3);
}

.metric-card strong {
    display: block;
    color: var(--accent);
    font-size: 18px;
    margin-bottom: var(--space-2);
}

.audience-link {
    display: inline-block;
    margin-top: auto;
    padding-top: var(--space-4);
    font-weight: 700;
    color: var(--accent);
    transition: color var(--motion-fast) var(--ease-standard);
}

.audience-link:hover {
    color: var(--accent-strong);
}

.trace-card {
    border-left: 4px solid var(--accent);
}

/* ========================================
   TABLES
   ======================================== */

.table-wrapper {
    margin: var(--space-8) 0;
    overflow-x: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface);
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 14px;
}

th,
td {
    padding: var(--space-4);
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    color: var(--text-muted);
    font-size: 12px;
    text-transform: uppercase;
    font-weight: 600;
}

td {
    color: var(--text-secondary);
}

tr:last-child td {
    border-bottom: none;
}

/* ========================================
   TABLE OF CONTENTS
   ======================================== */

.toc {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    margin: var(--space-12) 0;
    box-shadow: var(--shadow-sm);
}

.toc h3 {
    margin-top: 0;
    color: var(--accent);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-4);
    font-size: 22px;
}

.search-input {
    background: var(--surface-muted);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    padding: 0 var(--space-4);
    height: 40px;
    font-size: 14px;
    width: 300px;
    outline: none;
    transition: all var(--motion-base) var(--ease-standard);
}

.search-input:focus {
    border-color: var(--accent);
    background: var(--surface);
    box-shadow: 0 0 0 2px var(--accent-soft);
}

.toc ul {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-3);
    margin: var(--space-8) 0 0 0;
}

.toc a {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    transition: all var(--motion-base) var(--ease-standard);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    display: block;
}

.toc a:hover {
    color: var(--accent);
    background: var(--accent-soft);
}

/* ========================================
   WORKFLOW DIAGRAM COMPONENTS
   ======================================== */

.legend {
    display: flex;
    gap: var(--space-6);
    margin-bottom: var(--space-8);
    padding: var(--space-4) var(--space-6);
    background: var(--surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    justify-content: center;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
}

.box {
    width: 14px;
    height: 14px;
    border-radius: var(--radius-xs);
}

.box.req {
    background: var(--accent);
}

.box.opt {
    border: 2px dashed var(--info);
}

.diagram-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
    width: 100%;
    padding: var(--space-10) 0;
}

.node-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
}

.node {
    width: 320px;
    background-color: var(--surface);
    padding: var(--space-6);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
    position: relative;
    z-index: 2;
    transition: all var(--motion-base) var(--ease-standard);
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.node:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.node.required {
    border-color: var(--accent-strong);
    box-shadow: 0 0 20px var(--accent-soft);
}

.node.optional {
    border-style: dashed;
    border-color: var(--info);
    opacity: 0.8;
}

.node-title {
    font-weight: 800;
    font-size: 18px;
    margin-bottom: var(--space-2);
    display: block;
}

.node.required .node-title {
    color: var(--accent-strong);
}

.node.optional .node-title {
    color: var(--info);
}

.node-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: var(--space-2) 0;
}

.status-badge {
    position: absolute;
    top: -10px;
    right: 12px;
    font-size: 10px;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-full);
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: var(--shadow-xs);
}

.required .status-badge {
    background: var(--accent);
    color: var(--text-inverse);
}

.optional .status-badge {
    background: var(--info);
    color: var(--text-inverse);
}

/* Arrows */
.arrow {
    height: 48px;
    width: 2px;
    background: var(--border-strong);
    position: relative;
}

.arrow::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: -4px;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 8px solid var(--border-strong);
}

/* Branching */
.row {
    display: flex;
    justify-content: center;
    gap: 80px;
    width: 100%;
    position: relative;
    padding: 48px 0;
    margin: var(--space-4) 0;
}

.branch-fork {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 400px;
    height: 48px;
    border-top: 2px solid var(--border-strong);
    border-left: 2px solid var(--border-strong);
    border-right: 2px solid var(--border-strong);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    z-index: 1;
}

.branch-fork::before {
    content: '';
    position: absolute;
    top: -48px;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 48px;
    background: var(--border-strong);
}

.branch-join {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 400px;
    height: 48px;
    border-bottom: 2px solid var(--border-strong);
    border-left: 2px solid var(--border-strong);
    border-right: 2px solid var(--border-strong);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    z-index: 1;
}

.branch-join::after {
    content: '';
    position: absolute;
    bottom: -48px;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 48px;
    background: var(--border-strong);
}

.branch-join::before {
    content: '';
    position: absolute;
    bottom: -56px;
    left: 50%;
    transform: translateX(-50%);
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 8px solid var(--border-strong);
}

.loop-back {
    position: absolute;
    right: -80px;
    top: 50%;
    height: 280px;
    width: 60px;
    border: 2px solid var(--danger);
    border-left: none;
    border-radius: 0 var(--radius-2xl) var(--radius-2xl) 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(248, 113, 113, 0.05);
}

.loop-text {
    writing-mode: vertical-rl;
    color: var(--danger);
    font-size: 11px;
    font-weight: 800;
    background: var(--background);
    padding: var(--space-4) 0;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ========================================
   ARTIFACT LISTINGS & TOOLTIPS
   ======================================== */

.artifacts-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--border);
    text-align: left;
}

.artifact-item {
    font-size: 12px;
    color: var(--accent-strong);
    font-family: var(--font-mono);
    position: relative;
    cursor: help;
    font-weight: 600;
}

.artifact-item::before {
    content: '📄 ';
}

.artifact-item:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    background: var(--primary);
    color: var(--text-inverse);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    font-size: 12px;
    left: 100%;
    top: 50%;
    transform: translateY(-50%);
    margin-left: var(--space-3);
    z-index: 10;
    white-space: nowrap;
    box-shadow: var(--shadow-lg);
}

/* ========================================
   CALLOUTS & EMPHASIS BLOCKS
   ======================================== */

.callout {
    border-radius: var(--radius-lg);
    padding: 14px 16px;
    border: 1px solid var(--border);
    background: var(--surface-muted);
    margin: var(--space-6) 0;
    color: var(--text-secondary);
}

.callout strong {
    color: var(--text-primary);
    display: block;
    margin-bottom: var(--space-2);
}

.callout.error {
    border-color: var(--danger);
    background: var(--danger-soft);
    color: var(--danger);
}

.vision-box {
    background: var(--accent-soft);
    padding: var(--space-10);
    border-radius: var(--radius-xl);
    border: 1px solid var(--accent);
    font-style: italic;
    text-align: center;
    font-size: 20px;
    line-height: 1.65;
    margin: var(--space-12) 0;
    color: var(--text-primary);
    box-shadow: var(--shadow-glow);
}

.non-negotiables {
    max-width: 1000px;
    margin: var(--space-16) auto;
    background: var(--surface);
    padding: var(--space-10);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--danger);
    box-shadow: var(--shadow-sm);
}

.nn-title {
    color: var(--danger);
    font-weight: 900;
    font-size: 28px;
    margin-bottom: var(--space-8);
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.nn-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-4);
}

.nn-item {
    font-size: 14px;
    color: var(--text-primary);
    padding: var(--space-4);
    background: var(--danger-soft);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--danger);
    transition: all var(--motion-base) var(--ease-standard);
}

.nn-item:hover {
    transform: translateX(4px);
    background: rgba(248, 113, 113, 0.15);
}

.coordination-list {
    background: var(--accent-soft);
    padding: var(--space-8);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--accent);
}

.coordination-list li {
    margin-bottom: var(--space-4);
    line-height: 1.6;
    color: var(--text-primary);
}

.coordination-list strong {
    color: var(--accent-strong);
}

/* ========================================
   FLOW DIAGRAMS
   ======================================== */

.flow-diagram {
    margin: var(--space-6) 0;
    padding: var(--space-6);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--surface-muted);
    box-shadow: inset var(--shadow-xs);
}

.flow-track {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-3);
}

.flow-node {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    border: 1px solid var(--accent);
    background: var(--surface);
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 700;
    white-space: nowrap;
    transition: all var(--motion-base) var(--ease-standard);
    box-shadow: var(--shadow-xs);
}

.flow-node:hover {
    border-color: var(--accent-strong);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.flow-decision {
    border-color: var(--info);
    border-radius: var(--radius-xl);
}

.flow-arrow {
    color: var(--text-muted);
    font-weight: 900;
}

.flow-branch-row {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-top: var(--space-4);
    color: var(--text-secondary);
    font-size: 14px;
}

.flow-branch-chip {
    display: inline-block;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-full);
    border: 1px solid var(--success);
    color: var(--success);
    font-weight: 700;
    font-size: 12px;
}

.flow-branch-no {
    border-color: var(--danger);
    color: var(--danger);
}

.flow-loop {
    font-size: 16px;
    color: var(--success);
}

/* ========================================
   CHIPS & BADGES
   ======================================== */

.chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-top: var(--space-4);
}

.chip {
    display: inline-block;
    border: 1px solid var(--border);
    background: var(--surface-muted);
    border-radius: var(--radius-full);
    padding: var(--space-2) var(--space-4);
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 600;
    transition: all var(--motion-base) var(--ease-standard);
}

.chip:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.badge {
    display: inline-flex;
    align-items: center;
    height: 24px;
    padding: 0 var(--space-2);
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 600;
    border: 1px solid var(--border);
    background: var(--surface-muted);
    color: var(--text-secondary);
    white-space: nowrap;
}

.badge-success {
    background: var(--success-soft);
    color: var(--success);
    border-color: transparent;
}

.badge-warning {
    background: var(--warning-soft);
    color: var(--warning);
    border-color: transparent;
}

.badge-danger {
    background: var(--danger-soft);
    color: var(--danger);
    border-color: transparent;
}

.badge-accent {
    background: var(--accent-soft);
    color: var(--accent-strong);
    border-color: transparent;
}

/* ========================================
   QUICKSTART & LADDER COMPONENTS
   ======================================== */

.quickstart-strip {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-4);
    margin-top: var(--space-6);
}

.quickstart-step {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    background: var(--surface);
    box-shadow: var(--shadow-sm);
}

.quickstart-step strong {
    display: block;
    margin-bottom: var(--space-2);
    color: var(--accent);
}

.ladder {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-4);
    margin-top: var(--space-6);
}

.ladder-stage {
    position: relative;
    padding: var(--space-4);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    background: var(--surface);
    box-shadow: var(--shadow-sm);
}

.ladder-stage strong {
    display: block;
    margin-bottom: var(--space-2);
    color: var(--accent);
}

/* ========================================
   LOOP STEPS
   ======================================== */

.loop-steps {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    margin: var(--space-8) auto;
    flex-wrap: wrap;
}

.loop-step {
    background: var(--surface);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    width: 150px;
    text-align: center;
    font-size: 14px;
    position: relative;
}

.loop-step::after {
    content: '→';
    position: absolute;
    right: -12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--border-strong);
}

.loop-step:last-child::after {
    content: '';
}

.loop-step.red {
    border-color: var(--danger);
    color: var(--danger);
}

.loop-step.green {
    border-color: var(--success);
    color: var(--success);
}

.anchor-target {
    scroll-margin-top: 20px;
}

/* ========================================
   MODALS & DIALOGS
   ======================================== */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.42);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal {
    background: var(--surface-raised);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    max-width: 560px;
    width: 90%;
    padding: var(--space-6);
    position: relative;
}

/* ========================================
   FOOTER
   ======================================== */

footer.main-footer {
    text-align: center;
    padding: var(--space-12);
    color: var(--text-muted);
    font-size: 14px;
    border-top: 1px solid var(--border);
    margin-top: var(--space-16);
    width: 100%;
}

/* ========================================
   BACK TO TOP BUTTON
   ======================================== */

#back-to-top {
    position: fixed;
    bottom: var(--space-10);
    right: var(--space-10);
    background-color: var(--accent);
    color: var(--text-inverse);
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    box-shadow: var(--shadow-md);
    opacity: 0;
    transition: all var(--motion-base) var(--ease-standard);
    font-size: 20px;
    z-index: 1000;
}

#back-to-top.visible {
    opacity: 1;
}

#back-to-top:hover {
    transform: scale(1.1);
    background-color: var(--accent-strong);
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 768px) {
    body {
        padding: var(--space-5) 0;
    }

    .container {
        width: 95%;
        padding: 0;
    }

    h1 {
        font-size: 36px;
    }

    h2 {
        font-size: 24px;
        margin-top: var(--space-8);
    }

    h3 {
        font-size: 20px;
    }

    section {
        max-width: 100%;
    }

    .audience-grid,
    .metric-grid,
    .trace-grid,
    .arch-grid,
    .skill-grid,
    .icon-grid {
        grid-template-columns: 1fr;
    }

    nav.main-nav ul {
        gap: var(--space-3);
        font-size: 13px;
        flex-wrap: wrap;
    }

    .toc ul {
        grid-template-columns: 1fr;
    }

    .search-input {
        width: 200px;
    }

    .nn-grid {
        grid-template-columns: 1fr;
    }

    .loop-steps {
        gap: var(--space-2);
    }

    .loop-step {
        width: 120px;
        padding: var(--space-3);
        font-size: 13px;
    }

    .hero-meta {
        justify-content: flex-start;
    }

    .flow-node {
        font-size: 13px;
        padding: var(--space-1) var(--space-3);
    }

    .flow-arrow {
        font-size: 14px;
    }

    #back-to-top {
        bottom: var(--space-6);
        right: var(--space-6);
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 28px;
    }

    h2 {
        font-size: 22px;
    }

    .hero {
        padding: var(--space-12) var(--space-3);
    }

    .section-card {
        padding: var(--space-4);
    }

    .toc {
        padding: var(--space-4);
    }

    .search-input {
        width: 150px;
    }

    .node {
        width: 250px;
    }

    .row {
        gap: 40px;
    }

    .branch-fork,
    .branch-join {
        width: 280px;
    }
}

/* ========================================
   DOC LAYOUT COMPONENTS (Merged from commond-2nd.css)
   ======================================== */

body.doc-layout {
    display: flex;
    flex-direction: row;
    align-items: flex-start;
    height: 100vh;
    overflow: hidden;
}

.sidebar {
    width: 280px;
    height: 100vh;
    background: var(--surface);
    border-right: 1px solid var(--border);
    padding: var(--space-6) 0;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    flex-shrink: 0;
    z-index: 50;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-weight: 600;
    font-size: 15px;
    color: var(--text-primary);
    text-decoration: none;
    margin-bottom: var(--space-8);
    padding: 0 var(--space-6);
}

.search-container {
    padding: 0 var(--space-4);
    margin-bottom: var(--space-6);
}

.nav-group {
    margin-bottom: var(--space-6);
    padding: 0 var(--space-4);
}

.nav-group-title {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: var(--space-2);
    padding: 0 var(--space-2);
}

.toc-list ul {
    list-style: none;
}

.toc-list a {
    display: block;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    transition: all var(--motion-fast) var(--ease-standard);
}

.toc-list a:hover {
    background: var(--surface-muted);
    color: var(--text-primary);
}

.toc-list a.active {
    background: var(--accent-soft);
    color: var(--accent-strong);
    font-weight: 600;
}

.content-area {
    flex: 1;
    height: 100vh;
    overflow-y: auto;
    scroll-behavior: smooth;
    background: var(--background);
    display: flex;
    flex-direction: column;
    position: relative;
}

.content-header {
    height: 56px;
    border-bottom: 1px solid var(--border);
    background: color-mix(in srgb, var(--background) 86%, transparent);
    backdrop-filter: blur(16px);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 0 var(--space-6);
    position: sticky;
    top: 0;
    z-index: 10;
}

.highlight-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}



.btn-github {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    height: 40px;
    padding: 0 16px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text-primary);
    text-decoration: none;
    transition: all var(--motion-fast) var(--ease-standard);
}

.btn-github:hover {
    background: var(--surface-muted);
    border-color: var(--border-strong);
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
    margin-bottom: var(--space-6);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
    margin-bottom: var(--space-8);
}

.metric-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: var(--space-2);
}

.metric-label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
}

.workflow-step {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
    align-items: flex-start;
}

.step-number {
    width: 24px;
    height: 24px;
    border-radius: var(--radius-full);
    background: var(--accent-soft);
    color: var(--accent-strong);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}

.code-comment {
    color: #7D828A;
    font-style: italic;
}

.code-keyword {
    color: #8B7CFF;
    font-weight: 600;
}

.code-string {
    color: #DCFCE7;
}



.mobile-nav-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
}

@media (max-width: 1024px) {
    .sidebar {
        position: fixed;
        left: -280px;
        transition: left var(--motion-base) var(--ease-standard);
        box-shadow: var(--shadow-lg);
    }

    .sidebar.open {
        left: 0;
    }

    .content-header {
        justify-content: space-between;
    }

    .mobile-nav-toggle {
        display: block;
    }
}

/* ========================================
   DIAGRAM SIZING
   ======================================== */
.diagram-wrapper {
    width: 100%;
    min-height: 600px;
    height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.diagram-wrapper svg {
    width: 100% !important;
    height: 100% !important;
    max-width: none !important;
}

/* ========================================
   UPGRADED PORTFOLIO CASE STUDY SYSTEM
   ======================================== */

html {
    scroll-padding-top: 80px;
}

html[data-theme] body {
    display: block;
    padding: 0;
    margin: 0;
    align-items: stretch;
    background-image: none;
    font-family: "Plus Jakarta Sans", Inter, ui-sans-serif, system-ui, sans-serif;
}

html[data-theme] .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
}

html[data-theme] section {
    width: 100%;
    margin-bottom: 0;
}

html[data-theme] section h2 {
    text-align: left;
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 16px;
}

html[data-theme] h1 {
    background: none;
    -webkit-text-fill-color: currentColor;
    color: var(--text-primary);
}

.w-full {
    width: 100%;
}

.font-mono {
    font-family: var(--font-mono);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    .pulse-dot {
        animation: none;
    }
}

.skip-link {
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 9999;
    transform: translateY(-200%);
    background: var(--text-primary);
    color: var(--text-inverse);
    padding: 10px 18px;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: transform var(--motion-fast) var(--ease-standard);
    box-shadow: var(--shadow-md);
}

.skip-link:focus-visible {
    transform: translateY(0);
}

/* --- SITE HEADER & NAVIGATION --- */
.site-header {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    width: 100%;
    background: color-mix(in srgb, var(--background) 82%, transparent);
    backdrop-filter: blur(16px) saturate(1.5);
    -webkit-backdrop-filter: blur(16px) saturate(1.5);
    border-bottom: 1px solid var(--border);
    transition: background-color var(--motion-base), border-color var(--motion-base);
}

.site-nav {
    width: 100%;
}

.nav-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 16px;
    letter-spacing: -0.03em;
}

.logo-mark {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    border-radius: var(--radius-md);
    background: var(--accent-soft);
    color: var(--accent);
    border: 1px solid color-mix(in srgb, var(--accent) 20%, transparent);
}

.logo-mark.small {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
}

.logo-accent {
    color: var(--accent);
}

.nav-version-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: 600;
    font-family: var(--font-mono);
    background: var(--surface-muted);
    color: var(--text-muted);
    border: 1px solid var(--border);
    margin-left: 6px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-link {
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all var(--motion-fast) var(--ease-standard);
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--surface-muted);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.theme-toggle {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border-radius: var(--radius-md);
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--motion-fast) var(--ease-standard);
}

.theme-toggle:hover {
    background: var(--surface-muted);
    border-color: var(--border-strong);
}

[data-theme="dark"] .theme-icon-sun {
    display: block;
}

[data-theme="dark"] .theme-icon-moon {
    display: none;
}

[data-theme="light"] .theme-icon-sun {
    display: none;
}

[data-theme="light"] .theme-icon-moon {
    display: block;
}

.nav-github-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    height: 38px;
    padding: 0 16px;
    border-radius: var(--radius-md);
    background: var(--primary);
    color: var(--text-inverse) !important;
    font-size: 13px;
    font-weight: 600;
    text-decoration: none;
    border: 1px solid var(--primary);
    transition: all var(--motion-fast) var(--ease-standard);
}

.nav-github-btn:hover {
    background: var(--primary-hover);
    opacity: 0.95;
    transform: translateY(-1px);
}

.nav-toggle {
    display: none;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 8px;
    cursor: pointer;
    color: var(--text-primary);
}

.hamburger-line {
    display: block;
    width: 20px;
    height: 2px;
    margin: 4px 0;
    background: currentColor;
    border-radius: 2px;
}

.nav-mobile {
    border-top: 1px solid var(--border);
    background: var(--surface);
    padding: 16px 24px;
}

.nav-mobile-inner {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mobile-cta-btn {
    display: block;
    text-align: center;
    padding: 10px;
    border-radius: var(--radius-md);
    background: var(--primary);
    color: var(--text-inverse);
    font-weight: 600;
    margin-top: 8px;
    text-decoration: none;
}

/* --- HERO SECTION --- */
.hero-section {
    position: relative;
    padding: 96px 0 72px;
    overflow: hidden;
    background: var(--background);
}

.hero-bg-glow {
    position: absolute;
    top: -15%;
    left: 50%;
    transform: translateX(-50%);
    width: 1000px;
    height: 600px;
    background: radial-gradient(ellipse at center, color-mix(in srgb, var(--accent) 18%, transparent) 0%, color-mix(in srgb, var(--info) 10%, transparent) 45%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.hero-grid-pattern {
    position: absolute;
    inset: 0;
    background-image: linear-gradient(to right, color-mix(in srgb, var(--border) 25%, transparent) 1px, transparent 1px),
        linear-gradient(to bottom, color-mix(in srgb, var(--border) 25%, transparent) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: radial-gradient(ellipse 80% 50% at 50% 0%, #000 70%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 80% 50% at 50% 0%, #000 70%, transparent 100%);
    pointer-events: none;
    z-index: 0;
}

.hero-container {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 1080px;
}

.hero-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-bottom: 28px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.02em;
    background: var(--surface);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-xs);
}

.hero-badge-accent {
    background: var(--accent-soft);
    color: var(--accent-strong);
    border-color: color-mix(in srgb, var(--accent) 25%, transparent);
}

.pulse-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 0 color-mix(in srgb, var(--accent) 70%, transparent);
    animation: pulseGlow 2s infinite cubic-bezier(0.66, 0, 0, 1);
}

@keyframes pulseGlow {
    to {
        box-shadow: 0 0 0 8px transparent;
    }
}

.hero-title {
    font-size: clamp(40px, 6.5vw, 76px);
    font-weight: 800;
    letter-spacing: -0.05em;
    line-height: 1.08;
    margin: 0 0 24px;
    color: var(--text-primary);
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(16px, 2vw, 20px);
    line-height: 1.65;
    max-width: 820px;
    margin: 0 auto 36px;
    color: var(--text-secondary);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px;
    margin-bottom: 56px;
}

button,
.btn-action,
.nav-link,
.nav-github-btn,
.theme-toggle,
.cap-tab-btn,
.inspect-tab,
.copy-prompt-btn,
.doc-link-card,
.output-block-header,
.chat-send-btn,
.panel-icon-btn,
.custom-select {
    cursor: pointer;
}

.btn-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    height: 48px;
    padding: 0 24px;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--motion-fast) var(--ease-standard);
}

.btn-action-primary {
    background: var(--accent);
    color: #FFFFFF !important;
    border: 1px solid var(--accent);
    box-shadow: 0 4px 14px color-mix(in srgb, var(--accent) 35%, transparent);
}

.btn-action-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px color-mix(in srgb, var(--accent) 45%, transparent);
}

.btn-action-secondary {
    background: var(--surface);
    color: var(--text-primary);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-xs);
}

.btn-action-secondary:hover {
    background: var(--surface-muted);
    border-color: var(--border-strong);
    transform: translateY(-2px);
}

.btn-action-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.btn-action-ghost:hover {
    background: var(--surface-muted);
    color: var(--text-primary);
    border-color: var(--border-strong);
}

.btn-action-lg {
    height: 52px;
    padding: 0 28px;
    font-size: 16px;
}

/* --- STATS GRID --- */
.hero-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-top: 16px;
}

.stat-card {
    padding: 20px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xs);
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 6px;
    transition: all var(--motion-fast) var(--ease-standard);
}

.stat-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.stat-icon-wrap {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    background: var(--surface-muted);
    color: var(--accent);
    display: grid;
    place-items: center;
    margin-bottom: 4px;
}

.stat-number {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.stat-desc {
    font-size: 13px;
    line-height: 1.4;
    color: var(--text-muted);
}

/* --- SECTIONS SHARED STYLES --- */
.section {
    padding: 88px 0;
    position: relative;
    width: 100%;
}

.section-bordered {
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    background: var(--surface);
}

.section-header {
    text-align: left;
    max-width: 800px;
    margin-bottom: 48px;
}

.section-header.text-center {
    text-align: center;
    margin-left: auto;
    margin-right: auto;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 12px;
}

.section-tag.center {
    margin-left: auto;
    margin-right: auto;
}

.section-title {
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.15;
    margin: 0 0 16px;
    color: var(--text-primary);
}

.section-lead {
    font-size: 17px;
    line-height: 1.68;
    color: var(--text-secondary);
    margin: 0;
}

/* --- AUDIENCE CARDS GRID --- */
.audience-cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.audience-card {
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 28px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    box-shadow: var(--shadow-xs);
    transition: all var(--motion-base) var(--ease-standard);
}

.audience-card:hover {
    border-color: var(--border-strong);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.card-header-icon {
    width: 46px;
    height: 46px;
    border-radius: var(--radius-lg);
    display: grid;
    place-items: center;
}

.color-recruiter {
    background: color-mix(in srgb, #635BFF 14%, transparent);
    color: #635BFF;
}

.color-engineer {
    background: color-mix(in srgb, #06B6D4 14%, transparent);
    color: #06B6D4;
}

.color-product {
    background: color-mix(in srgb, #10B981 14%, transparent);
    color: #10B981;
}

.audience-role {
    font-size: 19px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: -0.02em;
}

.audience-summary {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin: 0;
}

.audience-bullet-list {
    list-style: none;
    padding: 0;
    margin: 8px 0 0 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.audience-bullet-list li {
    font-size: 13px;
    color: var(--text-muted);
    position: relative;
    padding-left: 18px;
    margin: 0;
}

.audience-bullet-list li::before {
    content: "•";
    position: absolute;
    left: 4px;
    color: var(--accent);
    font-weight: bold;
}

/* --- INTERACTIVE SIMULATOR --- */
.simulator-layout {
    display: grid;
    grid-template-columns: 360px 1fr;
    gap: 28px;
    align-items: start;
}

.sim-controls-panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 18px;
    box-shadow: var(--shadow-sm);
}

.sim-panel-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 4px;
    letter-spacing: -0.02em;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.control-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.custom-select {
    width: 100%;
    height: 42px;
    background: var(--background);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 0 12px;
    font-size: 13px;
    font-weight: 500;
    outline: none;
    transition: all var(--motion-fast) var(--ease-standard);
    cursor: pointer;
}

.custom-select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-soft);
}

.sim-metadata-box {
    margin-top: 6px;
    padding: 14px;
    background: var(--surface-muted);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.meta-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
}

.meta-label {
    color: var(--text-muted);
}

.meta-val {
    font-weight: 600;
    color: var(--text-primary);
}

/* --- SIMULATED CHROME BROWSER FRAME --- */
.sim-browser-frame {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    min-height: 580px;
}

.browser-topbar {
    height: 44px;
    background: var(--surface-muted);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    padding: 0 16px;
    gap: 16px;
}

.traffic-lights {
    display: flex;
    gap: 6px;
}

.light {
    width: 11px;
    height: 11px;
    border-radius: 50%;
}

.light.red {
    background: #FF5F56;
}

.light.yellow {
    background: #FFBD2E;
}

.light.green {
    background: #27C93F;
}

.browser-address-bar {
    flex: 1;
    height: 28px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 10px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-secondary);
}

.browser-actions {
    display: flex;
    align-items: center;
}

.browser-ext-icon {
    display: grid;
    place-items: center;
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    background: var(--accent-soft);
    color: var(--accent);
    cursor: default;
}

.browser-content-area {
    display: flex;
    flex: 1;
    min-height: 536px;
}

.sim-webpage-view {
    flex: 1;
    padding: 24px;
    background: var(--background);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.sim-video-player {
    aspect-ratio: 16/9;
    background: #0B0D10;
    border-radius: var(--radius-lg);
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.player-overlay {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    background: radial-gradient(circle, rgba(0, 0, 0, 0.2) 0%, rgba(0, 0, 0, 0.6) 100%);
}

.player-play-btn {
    width: 54px;
    height: 54px;
    border-radius: 50%;
    background: #FF0000;
    color: #FFFFFF;
    display: grid;
    place-items: center;
    box-shadow: 0 4px 16px rgba(255, 0, 0, 0.4);
}

.player-title {
    position: relative;
    z-index: 1;
    color: #FFFFFF;
    font-size: 14px;
    font-weight: 600;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.8);
}

.sim-page-skeleton {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.skel-line {
    height: 12px;
    background: var(--border-subtle);
    border-radius: var(--radius-xs);
}

.skel-line.w-80 {
    width: 80%;
}

.skel-line.w-60 {
    width: 60%;
}

.skel-card {
    height: 80px;
    background: var(--surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    margin-top: 6px;
}

/* --- SIMULATED EXTENSION SIDE PANEL --- */
.sim-sidepanel-view {
    width: 380px;
    border-left: 1px solid var(--border);
    background: var(--surface);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.panel-header {
    height: 48px;
    padding: 0 14px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.panel-brand {
    display: flex;
    align-items: center;
    gap: 8px;
}

.panel-logo-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
}

.panel-title-text {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-primary);
}

.panel-source-badge {
    padding: 2px 6px;
    border-radius: var(--radius-xs);
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    font-family: var(--font-mono);
    background: var(--accent-soft);
    color: var(--accent-strong);
}

.panel-icon-btn {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    display: grid;
    place-items: center;
    cursor: pointer;
}

.panel-icon-btn:hover {
    background: var(--surface-muted);
    color: var(--text-primary);
}

.panel-status-bar {
    padding: 8px 14px;
    background: var(--surface-muted);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.status-indicator.ready {
    background: var(--success);
}

.status-indicator.running {
    background: var(--warning);
    animation: pulseGlow 1s infinite alternate;
}

.status-text {
    color: var(--text-secondary);
    font-weight: 500;
}

.panel-scroll-content {
    flex: 1;
    padding: 12px;
    overflow-y: auto;
    max-height: 400px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.output-block-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--background);
    overflow: hidden;
}

.output-block-header {
    width: 100%;
    padding: 10px 12px;
    background: var(--surface-muted);
    border: none;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    text-align: left;
}

.header-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    font-weight: 700;
    color: var(--text-primary);
}

.badge-deep-only {
    padding: 2px 6px;
    border-radius: var(--radius-full);
    font-size: 9px;
    font-weight: 700;
    text-transform: uppercase;
    background: color-mix(in srgb, var(--accent) 20%, transparent);
    color: var(--accent);
    margin-left: auto;
    margin-right: 8px;
}

.chevron-icon {
    color: var(--text-muted);
    transition: transform var(--motion-fast);
}

.output-block-header[aria-expanded="false"] .chevron-icon {
    transform: rotate(-90deg);
}

.output-block-header[aria-expanded="false"] {
    border-bottom-color: transparent;
}

.output-block-body {
    padding: 12px;
    font-size: 12.5px;
    line-height: 1.55;
    color: var(--text-secondary);
}

.output-block-body p {
    margin: 0;
    font-size: 12.5px;
}

.takeaway-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.takeaway-list li {
    font-size: 12px;
    color: var(--text-secondary);
    padding-left: 14px;
    position: relative;
    margin: 0;
}

.takeaway-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
    font-size: 11px;
}

.timeline-entries {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.timeline-row {
    display: flex;
    align-items: baseline;
    gap: 8px;
    font-size: 12px;
}

.time-badge {
    padding: 1px 5px;
    border-radius: var(--radius-xs);
    background: var(--surface-muted);
    color: var(--accent);
    font-size: 11px;
    font-weight: 700;
}

.panel-followup-answer {
    margin: 0 12px 10px;
    padding: 10px 12px;
    border-radius: var(--radius-md);
    background: var(--accent-soft);
    border: 1px solid color-mix(in srgb, var(--accent) 18%, transparent);
}

.followup-label {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--accent-strong);
    margin-bottom: 4px;
    font-family: var(--font-mono);
}

.panel-followup-answer p {
    margin: 0;
    font-size: 12px;
    line-height: 1.5;
    color: var(--text-secondary);
}

.panel-chat-input-box {
    padding: 10px 12px;
    border-top: 1px solid var(--border);
    background: var(--surface);
}

.chat-input-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 4px 8px;
}

.chat-input-wrapper input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: 12px;
    color: var(--text-primary);
    outline: none;
}

.chat-send-btn {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    background: var(--accent);
    color: #FFFFFF;
    border: none;
    display: grid;
    place-items: center;
    cursor: pointer;
}

/* --- CAPABILITIES TABS --- */
.cap-tab-system {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.cap-tab-list {
    display: flex;
    gap: 8px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 0;
    overflow-x: auto;
}

.cap-tab-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 18px;
    border: none;
    background: transparent;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: all var(--motion-fast) var(--ease-standard);
    white-space: nowrap;
}

.cap-tab-btn:hover {
    color: var(--text-primary);
}

.cap-tab-btn.is-active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.cap-panel-content {
    display: none;
}

.cap-panel-content.is-active {
    display: block;
    animation: fadeIn 200ms ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(4px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-grid-4,
.feature-grid-5 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.feature-grid-5 {
    grid-template-columns: repeat(5, minmax(0, 1fr));
}

.feature-card {
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 22px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    transition: all var(--motion-fast) var(--ease-standard);
}

.feature-card:hover {
    border-color: var(--border-strong);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.feature-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    display: grid;
    place-items: center;
}

.youtube-color {
    background: rgba(255, 0, 0, 0.12);
    color: #FF0000;
}

.web-color {
    background: rgba(6, 182, 212, 0.12);
    color: #06B6D4;
}

.course-color {
    background: rgba(139, 92, 246, 0.12);
    color: #8B5CF6;
}

.select-color {
    background: rgba(16, 185, 129, 0.12);
    color: #10B981;
}

.pdf-color {
    background: rgba(154, 52, 18, 0.12);
    color: #9A3412;
}

.feature-card h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.feature-card p {
    font-size: 13px;
    line-height: 1.55;
    color: var(--text-secondary);
    margin: 0;
}

.feature-pill-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 4px;
}

.micro-pill {
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 11px;
    font-family: var(--font-mono);
    background: var(--surface-muted);
    color: var(--text-muted);
    border: 1px solid var(--border);
}

/* --- MODES GRID 8 --- */
.modes-grid-8 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.mode-item {
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.mode-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.mode-name {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
}

.mode-badge-default {
    font-size: 10px;
    font-weight: 600;
    padding: 1px 6px;
    border-radius: var(--radius-full);
    background: var(--accent-soft);
    color: var(--accent);
}

.mode-item p {
    font-size: 12px;
    line-height: 1.5;
    color: var(--text-secondary);
    margin: 0;
}

/* --- CONTRACT CARDS --- */
.section-contract-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.contract-card {
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.contract-tag {
    font-size: 11px;
    color: var(--accent);
    font-weight: 600;
}

.contract-card h4 {
    font-size: 15px;
    font-weight: 700;
    margin: 0;
}

.contract-card p {
    font-size: 13px;
    line-height: 1.55;
    color: var(--text-secondary);
    margin: 0;
}

/* --- PROVIDERS TRIAD --- */
.providers-triad {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.provider-box {
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.provider-badge {
    align-self: flex-start;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    font-family: var(--font-mono);
    background: var(--surface-muted);
    color: var(--text-muted);
    border: 1px solid var(--border);
}

.provider-box h3 {
    font-size: 18px;
    font-weight: 700;
    margin: 0;
}

.provider-box p {
    font-size: 13px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin: 0;
}

.provider-specs {
    margin-top: auto;
    font-size: 11px;
    color: var(--text-muted);
    background: var(--surface-muted);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

/* --- PIPELINE VISUAL CONTAINER --- */
.pipeline-visual-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 48px;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 12px;
}

.pipe-step-card {
    flex: 1;
    min-width: 170px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 18px 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    box-shadow: var(--shadow-xs);
    transition: all var(--motion-fast) var(--ease-standard);
}

.pipe-step-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.step-num {
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 800;
    color: var(--accent);
}

.step-content h4 {
    font-size: 14px;
    font-weight: 700;
    margin: 0 0 6px;
}

.step-desc {
    font-size: 12px;
    line-height: 1.45;
    color: var(--text-secondary);
    margin: 0 0 10px;
}

.step-badge {
    font-family: var(--font-mono);
    font-size: 10.5px;
    color: var(--text-muted);
    background: var(--surface-muted);
    padding: 2px 6px;
    border-radius: var(--radius-xs);
    display: inline-block;
    border: 1px solid var(--border);
}

.pipe-connector {
    color: var(--text-disabled);
    display: grid;
    place-items: center;
}

/* --- ARCHITECTURE ACCORDIONS --- */
.arch-accordion-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.arch-accordion-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--surface);
    overflow: hidden;
    transition: border-color var(--motion-fast);
}

.arch-accordion-item[open] {
    border-color: var(--border-strong);
}

.arch-summary {
    padding: 18px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    user-select: none;
}

.arch-summary:hover {
    background: var(--surface-muted);
}

.summary-title {
    display: flex;
    align-items: center;
    gap: 12px;
}

.summary-title svg {
    color: var(--accent);
}

.summary-icon {
    font-size: 18px;
    color: var(--text-muted);
    font-weight: bold;
}

.arch-accordion-item[open] .summary-icon {
    transform: rotate(45deg);
}

.arch-content-body {
    padding: 0 24px 20px 54px;
    font-size: 14px;
    line-height: 1.65;
    color: var(--text-secondary);
}

.arch-content-body p {
    margin: 0;
}

/* --- PROMPT INSPECTOR --- */
.prompt-inspector-card {
    background: var(--code-bg);
    border: 1px solid var(--code-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.inspector-header {
    background: #11141A;
    border-bottom: 1px solid var(--code-border);
    padding: 8px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

.inspector-tabs {
    display: flex;
    gap: 4px;
    overflow-x: auto;
}

.inspect-tab {
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    background: transparent;
    border: none;
    color: #9CA3AF;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--motion-fast);
}

.inspect-tab:hover {
    color: #FFFFFF;
    background: #1E232D;
}

.inspect-tab.is-active {
    color: #FFFFFF;
    background: #252B38;
}

.copy-prompt-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    border-radius: var(--radius-sm);
    background: #1E232D;
    border: 1px solid #323A4A;
    color: #E5E7EB;
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--motion-fast);
}

.copy-prompt-btn:hover {
    background: #2D3545;
    color: #FFFFFF;
}

.inspector-code-body {
    padding: 20px;
    overflow-x: auto;
}

.code-view {
    margin: 0;
    padding: 0;
    background: transparent;
    border: none;
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.65;
    color: var(--code-text);
}

/* --- DECISIONS MASONRY --- */
.decisions-masonry {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.decision-box {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 28px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    box-shadow: var(--shadow-xs);
    position: relative;
    transition: all var(--motion-fast) var(--ease-standard);
}

.decision-box:hover {
    border-color: var(--border-strong);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.decision-num {
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 800;
    color: var(--accent);
}

.decision-box h3 {
    font-size: 17px;
    font-weight: 700;
    margin: 0;
}

.decision-box p {
    font-size: 13.5px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin: 0;
}

.decision-pills {
    display: flex;
    gap: 6px;
    margin-top: 6px;
}

.dpill {
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 11px;
    font-family: var(--font-mono);
    background: var(--surface-muted);
    color: var(--text-muted);
    border: 1px solid var(--border);
}

.dpill.green {
    background: var(--success-soft);
    color: var(--success);
    border-color: color-mix(in srgb, var(--success) 20%, transparent);
}

/* --- DOCS DIRECTORY GRID --- */
.docs-directory-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.doc-link-card {
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px;
    display: flex;
    align-items: flex-start;
    gap: 14px;
    text-decoration: none;
    transition: all var(--motion-fast) var(--ease-standard);
}

.doc-link-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.doc-file-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    background: var(--surface-muted);
    color: var(--accent);
    display: grid;
    place-items: center;
    flex-shrink: 0;
}

.doc-info {
    flex: 1;
}

.doc-name {
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.doc-desc {
    font-size: 12px;
    line-height: 1.45;
    color: var(--text-muted);
}

.doc-arrow {
    font-size: 16px;
    color: var(--text-muted);
}

.doc-link-card:hover .doc-arrow {
    color: var(--accent);
    transform: translate(2px, -2px);
}

/* --- CTA HIGHLIGHT SECTION --- */
.cta-highlight-section {
    background: radial-gradient(circle at 50% 0%, color-mix(in srgb, var(--accent) 12%, transparent) 0%, var(--surface) 60%);
    border-top: 1px solid var(--border);
    padding: 96px 0;
}

.cta-title {
    font-size: clamp(32px, 5vw, 52px);
    margin-bottom: 18px;
}

.mx-auto {
    margin-left: auto;
    margin-right: auto;
}

.text-center {
    text-align: center;
}

.cta-actions-row {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-top: 40px;
    flex-wrap: wrap;
}

/* --- FOOTER --- */
.site-footer {
    border-top: 1px solid var(--border);
    background: var(--background);
    padding: 64px 0 0;
    width: 100%;
}

.footer-container {
    display: flex;
    justify-content: space-between;
    gap: 48px;
    padding-bottom: 48px;
    flex-wrap: wrap;
}

.footer-left {
    max-width: 320px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 16px;
    color: var(--text-primary);
}

.footer-subtext {
    font-size: 13px;
    color: var(--text-muted);
    margin: 0;
}

.footer-nav {
    display: flex;
    gap: 56px;
    flex-wrap: wrap;
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-heading {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    font-family: var(--font-mono);
    color: var(--text-primary);
    margin-bottom: 4px;
}

.footer-col a {
    font-size: 13px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--motion-fast);
}

.footer-col a:hover {
    color: var(--accent);
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding: 24px 0;
    background: var(--surface);
}

.footer-bottom-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--text-muted);
    flex-wrap: wrap;
    gap: 12px;
}

/* --- RESPONSIVE BREAKPOINTS --- */
@media (max-width: 1100px) {
    .simulator-layout {
        grid-template-columns: 1fr;
    }

    .sim-browser-frame {
        min-height: auto;
    }

    .feature-grid-4,
    .feature-grid-5 {
        grid-template-columns: repeat(2, 1fr);
    }

    .modes-grid-8 {
        grid-template-columns: repeat(2, 1fr);
    }

    .docs-directory-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 860px) {
    .nav-links {
        display: none;
    }

    .nav-toggle {
        display: block;
    }

    .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .audience-cards-grid {
        grid-template-columns: 1fr;
    }

    .section-contract-grid {
        grid-template-columns: 1fr;
    }

    .providers-triad {
        grid-template-columns: 1fr;
    }

    .decisions-masonry {
        grid-template-columns: 1fr;
    }

    .browser-content-area {
        flex-direction: column;
    }

    .sim-sidepanel-view {
        width: 100%;
        border-left: none;
        border-top: 1px solid var(--border);
    }
}

@media (max-width: 600px) {
    .hero-stats-grid {
        grid-template-columns: 1fr;
    }

    .feature-grid-4,
    .feature-grid-5 {
        grid-template-columns: 1fr;
    }

    .modes-grid-8 {
        grid-template-columns: 1fr;
    }

    .docs-directory-grid {
        grid-template-columns: 1fr;
    }

    .hero-actions {
        flex-direction: column;
    }

    .btn-action {
        width: 100%;
    }

    .footer-container {
        flex-direction: column;
        gap: 32px;
    }

    .footer-nav {
        gap: 32px;
    }
}

/* ==========================================================================
   PRODUCT SHOWCASE UPGRADES (Features, Compare, Security, Install, FAQ)
   ========================================================================== */

/* --- HERO PROOF STRIP --- */
.hero-proof {
    display: flex;
    flex-wrap: wrap;
    gap: 16px 28px;
    margin-top: 36px;
    padding-top: 24px;
    border-top: 1px solid var(--border-subtle, rgba(255, 255, 255, 0.08));
}

html[data-theme="light"] .hero-proof {
    border-top-color: rgba(15, 23, 42, 0.08);
}

.proof-item {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 13.5px;
    font-weight: 500;
    color: var(--text-secondary);
}

.proof-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 3px 7px;
    border-radius: 6px;
    background: var(--surface-raised);
    border: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 0.04em;
}

/* --- SCENARIO PRESET STRIP --- */
.scenario-strip {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 24px;
}

.scenario-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text-primary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--motion-fast) var(--ease-standard);
}

.scenario-btn:hover {
    border-color: var(--accent);
    background: var(--surface-raised);
    transform: translateY(-1px);
}

.scenario-btn.is-active {
    border-color: var(--accent);
    background: var(--surface-raised);
    color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent), 0 4px 14px rgba(99, 102, 241, 0.18);
}

.scenario-tag {
    display: inline-block;
    padding: 2px 6px;
    border-radius: 4px;
    background: rgba(99, 102, 241, 0.12);
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 10.5px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* --- BENEFIT GRID (PROBLEM-SOLUTION) --- */
.benefit-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.benefit-card {
    position: relative;
    padding: 28px 24px;
    border-radius: 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    transition: transform var(--motion-fast) var(--ease-standard), border-color var(--motion-fast), box-shadow var(--motion-fast);
}

.benefit-card:hover {
    transform: translateY(-3px);
    border-color: var(--accent);
    box-shadow: 0 12px 28px -8px rgba(0, 0, 0, 0.35);
}

html[data-theme="light"] .benefit-card:hover {
    box-shadow: 0 12px 28px -8px rgba(15, 23, 42, 0.1);
}

.benefit-index {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: rgba(99, 102, 241, 0.12);
    border: 1px solid rgba(99, 102, 241, 0.25);
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 700;
    margin-bottom: 16px;
}

.benefit-card h3 {
    margin: 0 0 10px 0;
    font-size: 17px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.35;
}

.benefit-card p {
    margin: 0;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-secondary);
}

.benefit-card p code {
    padding: 2px 5px;
    border-radius: 4px;
    background: var(--surface-raised);
    border: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--accent);
}

/* --- COMPARISON TABLE --- */
.table-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow-x: auto;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.compare-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 14px;
}

.compare-table thead th {
    padding: 16px 20px;
    font-size: 13px;
    font-weight: 700;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border);
    background: var(--surface-raised);
    letter-spacing: 0.02em;
}

.compare-table thead th:last-child {
    color: var(--accent);
    background: rgba(99, 102, 241, 0.08);
    border-bottom-color: var(--accent);
}

.compare-table tbody tr {
    border-bottom: 1px solid var(--border);
    transition: background-color var(--motion-fast);
}

.compare-table tbody tr:last-child {
    border-bottom: none;
}

.compare-table tbody tr:hover {
    background: var(--surface-raised);
}

.compare-table tbody th[scope="row"] {
    padding: 16px 20px;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
}

.compare-table tbody td {
    padding: 16px 20px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.compare-table tbody td:last-child {
    font-weight: 600;
    color: var(--text-primary);
    background: rgba(99, 102, 241, 0.04);
}

/* --- PRIVACY & SECURITY GRID --- */
.security-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.security-card {
    padding: 24px 20px;
    border-radius: 14px;
    background: var(--surface);
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.sec-badge {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    padding: 3px 8px;
    border-radius: 999px;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.sec-badge-success {
    background: rgba(34, 197, 94, 0.12);
    color: var(--success);
    border: 1px solid rgba(34, 197, 94, 0.28);
}

.sec-badge-info {
    background: rgba(99, 102, 241, 0.12);
    color: var(--accent);
    border: 1px solid rgba(99, 102, 241, 0.28);
}

.sec-badge-warning {
    background: rgba(245, 158, 11, 0.12);
    color: var(--warning);
    border: 1px solid rgba(245, 158, 11, 0.28);
}

.security-card h3 {
    margin: 0;
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.35;
}

.security-card p {
    margin: 0;
    font-size: 13.5px;
    color: var(--text-secondary);
    line-height: 1.55;
}

.security-card p code {
    padding: 2px 4px;
    border-radius: 4px;
    background: var(--surface-raised);
    border: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 12px;
}

/* --- LOCAL INSTALLATION STEPS --- */
.install-steps {
    list-style: none;
    padding: 0;
    margin: 0 0 36px 0;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.install-step {
    display: flex;
    gap: 16px;
    padding: 24px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
}

.install-num {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: var(--surface-raised);
    border: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 14px;
    font-weight: 800;
    color: var(--accent);
    flex-shrink: 0;
}

.install-step h3 {
    margin: 0 0 6px 0;
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
}

.install-step p {
    margin: 0;
    font-size: 13.5px;
    color: var(--text-secondary);
    line-height: 1.55;
}

.install-step code,
.install-step kbd {
    padding: 2px 5px;
    border-radius: 4px;
    background: var(--surface-raised);
    border: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-primary);
}

.install-code-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 12px;
    background: var(--surface-raised);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 6px 10px;
}

.install-code {
    margin: 0;
    padding: 0;
    background: transparent;
    border: none;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-primary);
    overflow-x: auto;
    flex: 1;
}

.install-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 16px;
}

.install-note {
    font-size: 13px;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.6;
}

/* --- FAQ ACCORDION --- */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 920px;
    margin: 0 auto;
}

.faq-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 0;
    overflow: hidden;
    transition: border-color var(--motion-fast);
}

.faq-item:hover,
.faq-item[open] {
    border-color: var(--accent);
}

.faq-item summary {
    padding: 18px 22px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    user-select: none;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: "+";
    font-family: var(--font-mono);
    font-size: 18px;
    color: var(--accent);
    transition: transform var(--motion-fast);
}

.faq-item[open] summary::after {
    content: "−";
}

.faq-item p {
    padding: 0 22px 20px 22px;
    margin: 0;
    font-size: 14px;
    line-height: 1.65;
    color: var(--text-secondary);
}

.faq-item p kbd {
    padding: 2px 5px;
    border-radius: 4px;
    background: var(--surface-raised);
    border: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-primary);
}

/* --- CODE SHOWCASE --- */
.code-showcase {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    overflow: hidden;
}

.code-showcase-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 16px;
    background: var(--surface-raised);
    border-bottom: 1px solid var(--border);
}

.code-showcase .code-view {
    padding: 20px 24px;
    overflow-x: auto;
}

/* --- RESPONSIVE UPDATES FOR NEW COMPONENTS --- */
@media (max-width: 1024px) {
    .benefit-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .security-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .install-steps {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .benefit-grid {
        grid-template-columns: 1fr;
    }

    .security-grid {
        grid-template-columns: 1fr;
    }

    .scenario-strip {
        flex-direction: column;
    }

    .scenario-btn {
        width: 100%;
        justify-content: space-between;
    }

    .hero-proof {
        flex-direction: column;
        gap: 12px;
    }
}

/* --- SIMULATED WORKFLOW STEPPER --- */
.sim-workflow-stepper {
    margin: 0 12px 10px;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface-muted);
}

.sim-workflow-stepper[hidden] {
    display: none !important;
}

.sim-stepper-track {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 6px;
}

.sim-stepper-step {
    display: flex;
    align-items: center;
    gap: 6px;
    min-width: 0;
    flex: 1;
}

.sim-stepper-node {
    width: 20px;
    height: 20px;
    border-radius: 999px;
    display: grid;
    place-items: center;
    flex-shrink: 0;
    border: 1.5px solid var(--border-strong);
    background: var(--surface);
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 700;
}

.sim-stepper-label {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.sim-step-name {
    font-size: 10px;
    font-weight: 600;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sim-step-detail {
    font-size: 9px;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sim-stepper-connector {
    height: 2px;
    flex: 0 0 10px;
    background: var(--border);
    border-radius: 999px;
}

.sim-stepper-step.is-active .sim-stepper-node {
    border-color: var(--accent);
    background: var(--accent-soft);
    color: var(--accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent);
    animation: pulse-node 1.5s ease-in-out infinite;
}

.sim-stepper-step.is-active .sim-step-name {
    color: var(--accent);
    font-weight: 700;
}

.sim-stepper-step.is-done .sim-stepper-node {
    border-color: var(--success);
    background: var(--success-soft);
    color: var(--success);
}

.sim-stepper-step.is-done + .sim-stepper-connector {
    background: var(--success);
}

@keyframes pulse-node {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.08); }
}

/* --- SIMULATED CONCEPT TREE --- */
.sim-concept-tree {
    display: grid;
    gap: 10px;
}

.sim-concept-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.sim-concept-filter {
    border: 1px solid var(--border);
    background: var(--surface-muted);
    color: var(--text-secondary);
    border-radius: 999px;
    min-height: 26px;
    padding: 0 10px;
    font-size: 10.5px;
    font-weight: 600;
    font-family: var(--font-sans);
    cursor: pointer;
}

.sim-concept-filter.is-active,
.sim-concept-filter:hover {
    border-color: var(--accent);
    background: var(--accent-soft);
    color: var(--accent);
}

.sim-concept-grid {
    display: grid;
    gap: 8px;
}

.sim-concept-node {
    border: 1px solid var(--border);
    background: var(--surface);
    border-radius: var(--radius-sm);
    padding: 8px 10px;
    border-left: 3px solid var(--border-strong);
}

.sim-concept-node.is-core {
    border-left-color: var(--accent);
    background: var(--accent-soft);
}

.sim-concept-node.is-important {
    border-left-color: var(--warning);
}

.sim-concept-node.is-supporting {
    border-left-color: var(--border-strong);
}

.sim-concept-tier {
    margin: 0 0 3px;
    font-family: var(--font-mono);
    font-size: 9.5px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.sim-concept-term {
    margin: 0;
    font-size: 12.5px;
    font-weight: 700;
    color: var(--text-primary);
}

.sim-concept-def {
    margin: 4px 0 0;
    font-size: 11.5px;
    line-height: 1.45;
    color: var(--text-secondary);
}

/* --- SIMULATED TIMELINE RAIL --- */
.sim-timeline-rail {
    list-style: none;
    margin: 0;
    padding: 0 0 0 14px;
    border-left: 2px solid var(--border-strong);
    display: grid;
    gap: 10px;
}

.sim-timeline-event {
    position: relative;
    padding-left: 12px;
}

.sim-timeline-marker {
    position: absolute;
    left: -19px;
    top: 6px;
    width: 10px;
    height: 10px;
    border-radius: 999px;
    background: var(--surface);
    border: 2px solid var(--accent);
}

.sim-timeline-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 8px 10px;
}

.sim-timeline-stamp {
    margin: 0 0 3px;
    font-size: 10px;
    font-weight: 700;
    color: var(--accent);
}

.sim-timeline-title {
    margin: 0;
    font-size: 12.5px;
    font-weight: 700;
    color: var(--text-primary);
}

.sim-timeline-detail {
    margin: 4px 0 0;
    font-size: 11.5px;
    line-height: 1.45;
    color: var(--text-secondary);
}

.output-block-body p,
.takeaway-list li,
.sim-timeline-detail,
.sim-concept-def {
    font-family: "Newsreader", "Lora", Georgia, serif;
}

@media (prefers-reduced-motion: reduce) {
    .sim-stepper-step.is-active .sim-stepper-node {
        animation: none;
    }
}