/* ===== Font Faces ===== */
@font-face {
    font-family: "JetBrains Mono";
    src: url("/assets/fonts/jetbrains-mono/JetBrainsMono-Regular.woff2") format("woff2");
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "JetBrains Mono";
    src: url("/assets/fonts/jetbrains-mono/JetBrainsMono-SemiBold.woff2") format("woff2");
    font-weight: 600;
    font-style: normal;
    font-display: swap;
}

/* ===== CSS Reset & Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    color-scheme: dark;
    
    /* Dark mode colors (default) */
    --color-bg: #0a0a0f;
    --color-surface: rgba(24, 24, 32, 0.6);
    --color-surface-hover: rgba(36, 36, 48, 0.7);
    --color-text: #e4e4e7;
    --color-text-secondary: #a1a1aa;
    --color-text-tertiary: #71717a;
    --color-primary: #3b82f6;
    --color-primary-hover: #60a5fa;
    --color-accent: #38bdf8;
    --color-border: rgba(63, 63, 70, 0.4);
    --color-border-hover: rgba(113, 113, 122, 0.6);
    --color-foundation: rgba(30, 58, 138, 0.3);
    --color-foundation-border: rgba(59, 130, 246, 0.5);
    
    /* Spacing scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    
    /* Typography scale */
    --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: "JetBrains Mono", ui-monospace, 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Liberation Mono', monospace;
    
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    
    /* Layout */
    --max-width: 1280px;
    --border-radius-sm: 0.375rem;
    --border-radius: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-pill: 2rem;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
        transform: none !important;
    }
}

/* ===== Base Elements ===== */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    position: relative;
}

/* Subtle multi-radial background with dot grid */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    background: 
        radial-gradient(circle at 20% 20%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 60%, rgba(139, 92, 246, 0.06) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(236, 72, 153, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background-image: radial-gradient(circle, rgba(113, 113, 122, 0.1) 1px, transparent 1px);
    background-size: 24px 24px;
    opacity: 0.3;
    pointer-events: none;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.03em;
}

h1 {
    font-family: var(--font-mono);
    font-size: clamp(2.5rem, 5vw + 1rem, 3.5rem);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.04em;
}

h2 {
    font-size: clamp(1.5rem, 3vw + 1rem, 1.875rem);
    margin-bottom: var(--space-3);
    letter-spacing: -0.025em;
}

h3 {
    font-size: var(--text-xl);
    font-weight: 600;
    letter-spacing: -0.02em;
}

/* Monospace only for specific elements */
.bento-tile h3,
.arch-box strong,
.node-label,
.map-title,
.meta-item,
pre,
code,
kbd,
samp {
    font-family: var(--font-mono);
    font-variant-ligatures: none;
}

p {
    line-height: 1.75;
    max-width: 65ch;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    text-underline-offset: 0.2em;
    text-decoration-thickness: 1px;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--color-primary-hover);
    text-decoration: underline;
}

/* Focus styles for accessibility */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 3px;
    border-radius: var(--border-radius-sm);
}

/* ===== Skip Link ===== */
.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: var(--space-4) var(--space-6);
    text-decoration: none;
    font-weight: 600;
    z-index: 100;
    border-radius: var(--border-radius);
}

.skip-link:focus-visible {
    top: var(--space-4);
    outline: 2px solid white;
}

/* ===== Layout Container ===== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--space-8);
    }
}

/* ===== Header ===== */
.header {
    padding: var(--space-6) 0;
    border-bottom: 1px solid var(--color-border);
}

.logo {
    display: block;
    max-width: 180px;
    height: auto;
}

/* ===== Architecture Hero Section ===== */
.hero {
    padding: var(--space-16) 0 var(--space-20) 0;
    background: transparent;
    position: relative;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-12);
    align-items: center;
}

@media (min-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-16);
    }
}

.hero-content h1 {
    margin-bottom: var(--space-4);
}

.hero-tagline {
    font-size: var(--text-xl);
    line-height: 1.5;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-8);
    max-width: 32rem;
}

.cta-group {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}

/* ===== System Map (Hero Diagram) ===== */
.hero-diagram {
    order: -1;
}

@media (min-width: 1024px) {
    .hero-diagram {
        order: 0;
    }
}

.system-map {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--space-8);
    backdrop-filter: blur(12px);
    transition: all 0.3s ease;
}

.system-map:hover {
    border-color: var(--color-border-hover);
}

.map-title {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-6);
    font-weight: 500;
}

.map-layer {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
}

.map-node {
    background: rgba(16, 16, 24, 0.5);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--space-4) var(--space-5);
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    min-width: 140px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(8px);
}

.map-node:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px -4px rgba(0, 0, 0, 0.3);
}

.foundation-layer .map-node {
    background: var(--color-foundation);
    border-color: var(--color-foundation-border);
}

.foundation-node {
    min-width: 100%;
}

.node-label {
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text);
}

.node-desc {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
}

.map-connector {
    height: var(--space-6);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.map-connector::before {
    content: '';
    width: 1px;
    height: 100%;
    background: var(--color-border-strong);
    position: absolute;
}

.map-connector::after {
    content: '↓';
    background: var(--color-surface);
    color: var(--color-text-tertiary);
    font-size: var(--text-sm);
    padding: 0 var(--space-2);
    z-index: 1;
}

.app-layer,
.workflow-layer {
    margin-top: var(--space-4);
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 0.75rem 1.75rem;
    border-radius: var(--border-radius-pill);
    font-weight: 500;
    font-size: var(--text-sm);
    text-decoration: none;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: white;
    border-color: transparent;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #60a5fa 0%, #3b82f6 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px 0 rgba(59, 130, 246, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--color-text);
    border-color: var(--color-border-hover);
    backdrop-filter: blur(8px);
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: var(--color-text-secondary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px 0 rgba(0, 0, 0, 0.2);
}

.btn-secondary:active {
    transform: translateY(0);
}

/* ===== Projects Section (Bento Grid) ===== */
.projects {
    padding: var(--space-20) 0;
    background: transparent;
}

.projects h2 {
    margin-bottom: var(--space-2);
}

.section-intro {
    color: var(--color-text-secondary);
    font-size: var(--text-lg);
    margin-bottom: var(--space-12);
}

.bento-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-4);
    grid-auto-rows: minmax(200px, auto);
}

@media (min-width: 640px) {
    .bento-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .bento-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--space-5);
    }
    
    .bento-tile[data-size="large"] {
        grid-column: span 2;
        grid-row: span 2;
    }
    
    .bento-tile[data-size="medium"] {
        grid-column: span 2;
    }
    
    .bento-tile[data-size="small"] {
        grid-column: span 2;
    }
}

.bento-tile {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    backdrop-filter: blur(12px);
}

.bento-tile:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-3px);
    box-shadow: 0 12px 24px -8px rgba(0, 0, 0, 0.4);
}

.bento-tile:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.tile-header {
    margin-bottom: var(--space-4);
}

.bento-tile h3 {
    margin-bottom: var(--space-3);
    font-size: var(--text-2xl);
}

.tile-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-top: var(--space-3);
    padding-top: var(--space-3);
    border-top: 1px solid var(--color-border);
}

.meta-item {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
    background: rgba(255, 255, 255, 0.03);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--color-border);
}

.tile-description {
    font-size: var(--text-sm);
    line-height: 1.6;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-5);
    flex-grow: 1;
}

.bento-tile[data-size="large"] .tile-description {
    font-size: var(--text-base);
}

.tile-links {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
    margin-top: auto;
    padding-top: var(--space-4);
}

.tile-link {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-primary);
    transition: color 0.2s ease;
    position: relative;
    z-index: 1;
}

.tile-link:hover {
    color: var(--color-primary-hover);
    text-decoration: underline;
}

/* ===== Architecture Section ===== */
.architecture {
    padding: var(--space-20) 0;
    background: var(--color-bg);
}

.architecture h2 {
    margin-bottom: var(--space-2);
}

.architecture-diagram {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    max-width: 900px;
    margin: 0 auto;
    margin-top: var(--space-12);
}

.arch-layer {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
    justify-content: center;
}

.arch-box {
    flex: 1;
    min-width: 200px;
    max-width: 320px;
    padding: var(--space-6);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(12px);
}

.arch-box:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-3px);
    box-shadow: 0 8px 16px -4px rgba(0, 0, 0, 0.3);
}

.arch-box.foundation {
    background-color: var(--color-foundation);
    border-color: var(--color-foundation-border);
    border-width: 1px;
}

.arch-box strong {
    font-size: var(--text-lg);
    font-family: var(--font-mono);
    color: var(--color-text);
}

.arch-box span {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

/* ===== Principles Section ===== */
.principles {
    padding: var(--space-20) 0;
    background: transparent;
}

.principles h2 {
    margin-bottom: var(--space-12);
}

.principles-list {
    list-style: none;
    max-width: 900px;
    margin: 0 auto;
    display: grid;
    gap: var(--space-5);
}

@media (min-width: 768px) {
    .principles-list {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-6);
    }
}

.principles-list li {
    background-color: var(--color-surface);
    border-left: 3px solid var(--color-primary);
    padding: var(--space-6);
    border-radius: var(--border-radius);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(12px);
    border-top: 1px solid var(--color-border);
    border-right: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.principles-list li:hover {
    border-left-width: 4px;
    padding-left: calc(var(--space-6) - 1px);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px -4px rgba(0, 0, 0, 0.3);
    border-top-color: var(--color-border-hover);
    border-right-color: var(--color-border-hover);
    border-bottom-color: var(--color-border-hover);
}

.principles-list strong {
    font-size: var(--text-lg);
    color: var(--color-text);
    font-weight: 600;
}

.principles-list span {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    line-height: 1.6;
}

/* ===== Footer ===== */
.footer {
    padding: var(--space-12) 0;
    background-color: var(--color-bg);
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer-nav {
    margin-bottom: var(--space-4);
}

.footer-nav a {
    color: var(--color-text);
    margin: 0 var(--space-4);
    font-weight: 500;
    font-size: var(--text-sm);
}

.footer-copyright {
    color: var(--color-text-tertiary);
    font-size: var(--text-sm);
}

/* ===== Project Detail Pages ===== */
.project-header {
    padding: var(--space-16) 0 var(--space-8) 0;
    border-bottom: 1px solid var(--color-border);
}

.project-title {
    font-size: clamp(2rem, 4vw + 1rem, 2.5rem);
    margin-bottom: var(--space-4);
}

.project-tagline {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
    max-width: 60ch;
}

.project-links {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
    margin-top: var(--space-6);
}

.project-links a {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: var(--text-sm);
    font-weight: 500;
    transition: all 0.2s ease;
}

.project-links a:hover {
    border-color: var(--color-primary);
    background: var(--color-surface-hover);
    transform: translateY(-1px);
    text-decoration: none;
}

.project-section {
    padding: var(--space-12) 0;
    border-bottom: 1px solid var(--color-border);
}

.project-section:last-child {
    border-bottom: none;
}

.project-section h2 {
    margin-bottom: var(--space-6);
}

/* At a Glance - Definition List */
.project-attrs {
    display: grid;
    gap: var(--space-5);
    max-width: 800px;
}

@media (min-width: 768px) {
    .project-attrs {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-6);
    }
}

.project-attrs > div {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--space-5);
    transition: all 0.2s ease;
}

.project-attrs > div:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-2px);
}

.project-attrs dt {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-2);
}

.project-attrs dd {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* Architecture Diagrams */
.diagram {
    font-family: var(--font-mono);
    font-size: clamp(0.65rem, 1.3vw, 0.85rem);
    line-height: 1.3;
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--space-6);
    overflow-x: auto;
    max-width: 100%;
    white-space: pre;
    tab-size: 4;
    backdrop-filter: blur(12px);
    margin: var(--space-6) 0;
}

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

/* Scrollbar styling for diagrams */
.diagram::-webkit-scrollbar {
    height: 8px;
}

.diagram::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--border-radius-sm);
}

.diagram::-webkit-scrollbar-thumb {
    background: var(--color-border-hover);
    border-radius: var(--border-radius-sm);
}

.diagram::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-tertiary);
}

/* Details/Summary for collapsible sections */
details {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--space-5);
    margin: var(--space-4) 0;
}

details[open] {
    padding-bottom: var(--space-6);
}

summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--color-text);
    padding: var(--space-2);
    margin: calc(-1 * var(--space-2));
    border-radius: var(--border-radius-sm);
    user-select: none;
    list-style: none;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

summary::-webkit-details-marker {
    display: none;
}

summary::before {
    content: '▶';
    font-size: var(--text-xs);
    transition: transform 0.2s ease;
    display: inline-block;
}

details[open] summary::before {
    transform: rotate(90deg);
}

summary:hover {
    background: rgba(255, 255, 255, 0.03);
}

summary:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

details .diagram {
    margin-top: var(--space-4);
}

/* How to Use - Step Lists */
.step-list {
    list-style: none;
    counter-reset: step-counter;
    max-width: 800px;
}

.step-list li {
    counter-increment: step-counter;
    position: relative;
    padding-left: var(--space-12);
    margin-bottom: var(--space-5);
}

.step-list li::before {
    content: counter(step-counter);
    position: absolute;
    left: 0;
    top: 0;
    width: 2rem;
    height: 2rem;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: var(--text-sm);
}

.step-list li strong {
    display: block;
    margin-bottom: var(--space-2);
    color: var(--color-text);
}

.step-list li span {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

/* Related Projects Grid */
.related-projects {
    display: grid;
    gap: var(--space-4);
    margin-top: var(--space-6);
}

@media (min-width: 768px) {
    .related-projects {
        grid-template-columns: repeat(2, 1fr);
    }
}

.related-project-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--space-5);
    transition: all 0.2s ease;
    display: block;
}

.related-project-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    text-decoration: none;
}

.related-project-card h3 {
    font-family: var(--font-mono);
    font-size: var(--text-lg);
    margin-bottom: var(--space-2);
    color: var(--color-text);
}

.related-project-card p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin: 0;
}

/* Navigation breadcrumb */
.breadcrumb {
    padding: var(--space-4) 0;
    border-bottom: 1px solid var(--color-border);
}

.breadcrumb nav {
    display: flex;
    gap: var(--space-2);
    align-items: center;
    flex-wrap: wrap;
    font-size: var(--text-sm);
}

.breadcrumb a {
    color: var(--color-text-secondary);
}

.breadcrumb a:hover {
    color: var(--color-primary);
}

.breadcrumb span {
    color: var(--color-text-tertiary);
}

/* Documentation Hub Styles */
.docs-grid {
    display: grid;
    gap: var(--space-5);
    margin-top: var(--space-8);
}

@media (min-width: 768px) {
    .docs-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.doc-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--space-6);
    transition: all 0.3s ease;
    display: block;
}

.doc-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px -4px rgba(0, 0, 0, 0.3);
    text-decoration: none;
}

.doc-card h3 {
    font-family: var(--font-mono);
    font-size: var(--text-xl);
    margin-bottom: var(--space-3);
    color: var(--color-text);
}

.doc-card p {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    margin: 0;
}

.doc-status {
    display: inline-block;
    margin-top: var(--space-3);
    padding: var(--space-1) var(--space-3);
    background: rgba(59, 130, 246, 0.1);
    color: var(--color-primary);
    border-radius: var(--border-radius-sm);
    font-size: var(--text-xs);
    font-weight: 500;
}

.doc-status.coming-soon {
    background: rgba(161, 161, 170, 0.1);
    color: var(--color-text-secondary);
}

/* ===== Mobile Optimizations ===== */
@media (max-width: 640px) {
    h1 {
        font-size: var(--text-4xl);
    }
    
    h2 {
        font-size: var(--text-2xl);
    }
    
    .hero {
        padding: var(--space-12) 0 var(--space-16) 0;
    }
    
    .hero-tagline {
        font-size: var(--text-lg);
    }
    
    .cta-group {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
    
    .system-map {
        padding: var(--space-5);
    }
    
    .map-node {
        min-width: 120px;
        padding: var(--space-3) var(--space-4);
    }
    
    .bento-tile {
        padding: var(--space-5);
    }
    
    .projects {
        padding: var(--space-12) 0;
    }
    
    .architecture,
    .principles {
        padding: var(--space-12) 0;
    }
    
    .project-header {
        padding: var(--space-12) 0 var(--space-6) 0;
    }
    
    .project-section {
        padding: var(--space-8) 0;
    }
    
    .diagram {
        font-size: 0.65rem;
        padding: var(--space-4);
    }
    
    .step-list li {
        padding-left: var(--space-10);
    }
    
    .step-list li::before {
        width: 1.75rem;
        height: 1.75rem;
    }
}