/*
 * Personal Website Styles
 * Design Philosophy:
 * - Preattentive Attributes: Color, size, and motion guide attention
 * - Gestalt Principles: Proximity groups content, similarity creates consistency
 * - Theme: Data-inspired but approachable
 */

/* ============================================
   CSS Custom Properties (Design Tokens)
   ============================================ */
:root {
    /* Color Palette - Warm, approachable with data-viz accent */
    --color-bg-primary: #0f1419;
    --color-bg-secondary: #1a2332;
    --color-bg-card: #1e2a3a;

    --color-text-primary: #e8edf4;
    --color-text-secondary: #9aa5b8;
    --color-text-muted: #778899;

    /* Accent colors inspired by data visualization palettes */
    --color-accent-primary: #4ecdc4;    /* Teal - primary accent */
    --color-accent-secondary: #ff6b6b;  /* Coral - secondary accent */
    --color-accent-tertiary: #ffe66d;   /* Yellow - highlight */

    /* Gradients */
    --gradient-accent: linear-gradient(135deg, var(--color-accent-primary), #45b7aa);
    --gradient-hero: linear-gradient(180deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);

    /* Typography Scale */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 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: 2rem;
    --text-4xl: 2.5rem;
    --text-5xl: 3.5rem;

    /* 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;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    /* Borders & Shadows */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 20px rgba(78, 205, 196, 0.15);
}

/* Light Theme Variables */
[data-theme="light"] {
    --color-bg-primary: #f8fafc;
    --color-bg-secondary: #e2e8f0;
    --color-bg-card: #ffffff;
    --color-text-primary: #1a202c;
    --color-text-secondary: #4a5568;
    --color-text-muted: #718096;
    --color-accent-primary: #097268;
    --color-accent-secondary: #e53e3e;
    --color-accent-tertiary: #d69e2e;
    --gradient-accent: linear-gradient(135deg, var(--color-accent-primary), #076058);
    --gradient-hero: linear-gradient(180deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --shadow-glow: 0 0 20px rgba(9, 114, 104, 0.15);
}

/* Light theme overrides for hardcoded colors */
[data-theme="light"] .nav-link.active {
    background: rgba(9, 114, 104, 0.1);
}

[data-theme="light"] .info-card {
    border-color: rgba(9, 114, 104, 0.15);
}

[data-theme="light"] .info-card:hover {
    border-color: rgba(9, 114, 104, 0.3);
}

[data-theme="light"] .focus-list li {
    background: rgba(9, 114, 104, 0.1);
}

[data-theme="light"] .focus-list li:hover {
    background: rgba(9, 114, 104, 0.2);
}

[data-theme="light"] .about-photo img {
    border-color: rgba(9, 114, 104, 0.25);
}

[data-theme="light"] .form-group input,
[data-theme="light"] .form-group textarea {
    border-color: rgba(9, 114, 104, 0.2);
}

[data-theme="light"] .form-group input:focus,
[data-theme="light"] .form-group textarea:focus {
    box-shadow: 0 0 0 3px rgba(9, 114, 104, 0.15);
}

[data-theme="light"] .footer {
    border-top-color: rgba(9, 114, 104, 0.15);
}


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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Skip to Content Link (Accessibility) */
.skip-to-content {
    position: absolute;
    top: -100%;
    left: var(--space-4);
    padding: var(--space-3) var(--space-6);
    background: var(--color-accent-primary);
    color: var(--color-bg-primary);
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    z-index: 1100;
    transition: top var(--transition-fast);
}

.skip-to-content:focus {
    top: var(--space-4);
}

/* ============================================
   Background Pattern (Subtle Data Grid)
   - Creates visual continuity (Gestalt)
   ============================================ */
.bg-pattern {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    opacity: 0.03;
    background-image:
        linear-gradient(var(--color-accent-primary) 1px, transparent 1px),
        linear-gradient(90deg, var(--color-accent-primary) 1px, transparent 1px);
    background-size: 50px 50px;
}

/* ============================================
   Navigation
   - Fixed position for continuity
   - Clear visual hierarchy (preattentive)
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 20, 25, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(78, 205, 196, 0.1);
    transition: background var(--transition-fast);
}

.navbar.scrolled {
    background: rgba(15, 20, 25, 0.95);
}

[data-theme="light"] .navbar {
    background: rgba(248, 250, 252, 0.85);
    border-bottom: 1px solid rgba(9, 114, 104, 0.15);
}

[data-theme="light"] .navbar.scrolled {
    background: rgba(248, 250, 252, 0.95);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-4) var(--space-6);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-mono);
    font-size: var(--text-xl);
    font-weight: 600;
    color: var(--color-accent-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
    transition: var(--transition-fast);
}

.nav-logo:hover {
    color: var(--color-text-primary);
    text-shadow: 0 0 10px var(--color-accent-primary);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav-links {
    display: flex;
    gap: var(--space-8);
    list-style: none;
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--text-sm);
    font-weight: 500;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-text-primary);
}

.nav-link.active {
    background: rgba(78, 205, 196, 0.1);
    color: var(--color-accent-primary);
}

.nav-link.external:hover {
    color: var(--color-accent-primary);
}

.external-icon {
    stroke: currentColor;
    stroke-width: 2;
    fill: none;
    opacity: 0.7;
}

/* Hamburger Toggle (hidden on desktop) */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
    z-index: 1001;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text-secondary);
    border-radius: 2px;
    transition: var(--transition-fast);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Theme Toggle Button */
.theme-toggle {
    background: transparent;
    border: 1px solid var(--color-text-muted);
    border-radius: var(--radius-md);
    padding: var(--space-2);
    cursor: pointer;
    color: var(--color-text-secondary);
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    color: var(--color-accent-primary);
    border-color: var(--color-accent-primary);
}

/* Show/hide appropriate icon based on theme */
[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: block; }
[data-theme="dark"] .icon-sun,
:root:not([data-theme="light"]) .icon-sun { display: block; }
[data-theme="dark"] .icon-moon,
:root:not([data-theme="light"]) .icon-moon { display: none; }

/* ============================================
   Hero Section
   - Strong visual hierarchy (preattentive)
   - Figure-ground separation (Gestalt)
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: var(--space-16) var(--space-6);
    background: var(--gradient-hero);
    position: relative;
}

.hero-content {
    max-width: 1200px;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: center;
}

.hero-text {
    z-index: 1;
}

.hero-greeting {
    font-size: var(--text-lg);
    color: var(--color-accent-primary);
    font-weight: 500;
    margin-bottom: var(--space-2);
    font-family: var(--font-mono);
}

.hero-name {
    font-size: var(--text-5xl);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-4);
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-tagline {
    font-size: var(--text-2xl);
    color: var(--color-text-secondary);
    font-weight: 500;
    margin-bottom: var(--space-4);
}

.hero-subtitle {
    font-size: var(--text-lg);
    color: var(--color-text-muted);
    max-width: 500px;
    line-height: 1.7;
}

/* Abstract Data Visualization Element */
.hero-visual {
    position: relative;
    height: 400px;
}

.data-viz-abstract {
    position: relative;
    width: 100%;
    height: 100%;
}

.viz-dot {
    position: absolute;
    width: 12px;
    height: 12px;
    background: var(--color-accent-primary);
    border-radius: 50%;
    left: var(--x);
    top: var(--y);
    animation: pulse 2s ease-in-out infinite;
    animation-delay: var(--delay);
    box-shadow: 0 0 20px var(--color-accent-primary);
}

.viz-dot:nth-child(2) { background: var(--color-accent-secondary); box-shadow: 0 0 20px var(--color-accent-secondary); }
.viz-dot:nth-child(4) { background: var(--color-accent-tertiary); box-shadow: 0 0 20px var(--color-accent-tertiary); }

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.8; }
    50% { transform: scale(1.3); opacity: 1; }
}

.viz-line {
    position: absolute;
    top: 30%;
    left: 20%;
    width: 65%;
    height: 2px;
    background: linear-gradient(90deg,
        var(--color-accent-primary) 0%,
        var(--color-accent-secondary) 50%,
        var(--color-accent-tertiary) 100%);
    opacity: 0.4;
    transform-origin: left center;
    animation: drawLine 3s ease-out forwards;
}

@keyframes drawLine {
    from { transform: scaleX(0); }
    to { transform: scaleX(1); }
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--space-10);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    color: var(--color-text-muted);
    font-size: var(--text-sm);
    animation: float 2s ease-in-out infinite;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--color-accent-primary);
    border-bottom: 2px solid var(--color-accent-primary);
    transform: rotate(45deg);
}

@keyframes float {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* ============================================
   About Section
   - Proximity groups related content (Gestalt)
   - Similarity in card styling (Gestalt)
   ============================================ */
.about-section {
    padding: var(--space-12) var(--space-6) var(--space-20);
    background: var(--color-bg-secondary);
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    font-size: var(--text-3xl);
    font-weight: 700;
    margin-bottom: var(--space-12);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--gradient-accent);
    border-radius: 2px;
}

.about-top {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--space-12);
    align-items: center;
    margin-bottom: var(--space-12);
}

.about-main {
    /* Main content area */
}

.about-photo {
    justify-self: center;
}

.about-photo img {
    width: 100%;
    max-width: 280px;
    border-radius: var(--radius-lg);
    border: 3px solid rgba(78, 205, 196, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.about-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
}

.about-lead {
    font-size: var(--text-xl);
    line-height: 1.7;
    color: var(--color-text-primary);
    margin-bottom: var(--space-8);
    padding-left: var(--space-6);
    border-left: 3px solid var(--color-accent-primary);
}

.about-details p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
    line-height: 1.8;
}

.about-details a {
    color: var(--color-text-primary);
    text-decoration: none;
    border-bottom: 2px solid var(--color-accent-primary);
    padding-bottom: 1px;
}

.about-details strong {
    color: var(--color-accent-primary);
    font-weight: 600;
}

/* Sidebar Cards - Similarity principle (Gestalt) */
/* About cards row - individual card styling handled by .info-card */

.info-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    border: 1px solid rgba(78, 205, 196, 0.1);
    transition: var(--transition-base);
}

.info-card:hover {
    border-color: rgba(78, 205, 196, 0.25);
    box-shadow: var(--shadow-glow);
}

.info-card h3 {
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-6);
    font-weight: 600;
}

.focus-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-top: var(--space-2);
}

.focus-list li {
    background: rgba(78, 205, 196, 0.1);
    color: var(--color-accent-primary);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    font-weight: 500;
    transition: var(--transition-fast);
}

.focus-list li:hover {
    background: rgba(78, 205, 196, 0.2);
}

.role-text,
.role-secondary {
    padding-bottom: var(--space-3);
    position: relative;
}

.role-text {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-6);
}

.role-secondary {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-text-primary);
}

.role-text::after,
.role-secondary::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--color-accent-primary);
}


/* ============================================
   Readings Section
   ============================================ */
.readings-section {
    padding: var(--space-20) var(--space-6);
    background: var(--color-bg-primary);
}

.readings-intro {
    color: var(--color-text-secondary);
    font-size: var(--text-lg);
    margin-top: calc(var(--space-8) * -1);
    margin-bottom: var(--space-10);
}

.readings-category {
    margin-bottom: var(--space-12);
}

.readings-category:last-child {
    margin-bottom: 0;
}

.readings-category h3 {
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-6);
    font-weight: 600;
}

.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(167px, 1fr));
    gap: var(--space-6);
}

.book-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(78, 205, 196, 0.1);
    overflow: hidden;
    transition: var(--transition-base);
}

.book-card:hover {
    border-color: rgba(78, 205, 196, 0.25);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.book-card img {
    width: 100%;
    aspect-ratio: 5 / 6;
    object-fit: contain;
    display: block;
    border-radius: var(--radius-lg);
    background: var(--color-bg-secondary);
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    text-align: center;
    padding: var(--space-4);
}


.book-card-fallback {
    width: 100%;
    aspect-ratio: 5 / 6;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-6);
    background: var(--color-bg-secondary);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    font-weight: 500;
    line-height: 1.5;
}

[data-theme="light"] .book-card {
    border-color: rgba(9, 114, 104, 0.15);
}

[data-theme="light"] .book-card:hover {
    border-color: rgba(9, 114, 104, 0.3);
}

/* ============================================
   Work Section (index.html preview)
   ============================================ */
.work-section {
    padding: var(--space-20) var(--space-6);
    background: var(--color-bg-primary);
}

.work-intro {
    color: var(--color-text-secondary);
    font-size: var(--text-lg);
    margin-top: calc(var(--space-8) * -1);
    margin-bottom: var(--space-10);
}

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

.work-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    border: 1px solid rgba(78, 205, 196, 0.1);
    transition: var(--transition-base);
}

.work-card:hover {
    border-color: rgba(78, 205, 196, 0.25);
    box-shadow: var(--shadow-glow);
}

[data-theme="light"] .work-card {
    border-color: rgba(9, 114, 104, 0.15);
}

[data-theme="light"] .work-card:hover {
    border-color: rgba(9, 114, 104, 0.3);
}

.work-type-badge {
    display: inline-block;
    background: rgba(78, 205, 196, 0.15);
    color: var(--color-accent-primary);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-4);
}

.work-type-badge.badge-project {
    background: rgba(255, 107, 107, 0.15);
    color: var(--color-accent-secondary);
}

.work-type-badge.badge-public {
    background: rgba(255, 230, 109, 0.15);
    color: var(--color-accent-tertiary);
}

[data-theme="light"] .work-type-badge {
    background: rgba(9, 114, 104, 0.1);
}

[data-theme="light"] .work-type-badge.badge-project {
    background: rgba(229, 62, 62, 0.1);
}

[data-theme="light"] .work-type-badge.badge-public {
    background: rgba(214, 158, 46, 0.15);
}

.work-card-title {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.work-card-meta {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-3);
}

.work-card-desc {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.work-cta {
    margin-top: var(--space-12);
    padding: var(--space-6) var(--space-8);
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(78, 205, 196, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-6);
}

.work-cta p {
    color: var(--color-text-secondary);
    font-size: var(--text-lg);
    margin: 0;
}

/* ============================================
   Work Page (work.html standalone)
   ============================================ */
.work-page {
    padding: calc(var(--space-20) + 60px) var(--space-6) var(--space-20);
    min-height: 100vh;
}

.work-page-intro {
    color: var(--color-text-secondary);
    font-size: var(--text-lg);
    margin-top: calc(var(--space-8) * -1);
    margin-bottom: var(--space-12);
}

.work-category {
    margin-bottom: var(--space-16);
}

.work-category-title {
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-6);
    font-weight: 600;
}

.publication-card {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: var(--space-6);
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(78, 205, 196, 0.1);
    padding: var(--space-6);
    margin-bottom: var(--space-4);
    transition: var(--transition-base);
}

.publication-card:hover {
    border-color: rgba(78, 205, 196, 0.25);
    box-shadow: var(--shadow-glow);
}

[data-theme="light"] .publication-card {
    border-color: rgba(9, 114, 104, 0.15);
}

[data-theme="light"] .publication-card:hover {
    border-color: rgba(9, 114, 104, 0.3);
}

.publication-meta {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.publication-year {
    font-family: var(--font-mono);
    font-size: var(--text-2xl);
    font-weight: 600;
    color: var(--color-accent-primary);
}

.publication-venue {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    font-style: italic;
}

.publication-content {
    display: flex;
    flex-direction: column;
}

.publication-title {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.publication-summary {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-4);
}

.publication-link {
    color: var(--color-accent-primary);
    text-decoration: none;
    font-size: var(--text-sm);
    font-weight: 500;
    transition: var(--transition-fast);
    align-self: flex-start;
}

.publication-link:hover {
    text-decoration: underline;
}

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

.project-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(78, 205, 196, 0.1);
    padding: var(--space-6);
    transition: var(--transition-base);
}

.project-card:hover {
    border-color: rgba(78, 205, 196, 0.25);
    box-shadow: var(--shadow-glow);
}

[data-theme="light"] .project-card {
    border-color: rgba(9, 114, 104, 0.15);
}

[data-theme="light"] .project-card:hover {
    border-color: rgba(9, 114, 104, 0.3);
}

.profile-card-header {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.profile-card-header .project-title {
    margin-bottom: 0;
}

.profile-icon {
    color: var(--color-accent-primary);
    flex-shrink: 0;
}

.project-title {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.project-desc {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-4);
}

/* ============================================
   Contact Section
   ============================================ */
.contact-section {
    padding: var(--space-20) var(--space-6);
    background: var(--color-bg-secondary);
}

.contact-section .section-container {
    max-width: 600px;
    margin: 0 auto;
}

.contact-intro {
    color: var(--color-text-secondary);
    font-size: var(--text-lg);
    margin-top: calc(var(--space-8) * -1);
    margin-bottom: var(--space-10);
}


.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
}

@media (max-width: 500px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-group label {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-group input,
.form-group textarea {
    background: var(--color-bg-card);
    border: 1px solid rgba(78, 205, 196, 0.15);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    font-family: var(--font-primary);
    font-size: var(--text-base);
    color: var(--color-text-primary);
    transition: var(--transition-fast);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-muted);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 0 3px rgba(78, 205, 196, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.submit-btn {
    align-self: flex-start;
    background: var(--gradient-accent);
    color: var(--color-bg-primary);
    border: none;
    border-radius: var(--radius-md);
    padding: var(--space-4) var(--space-8);
    font-family: var(--font-primary);
    font-size: var(--text-base);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(78, 205, 196, 0.3);
}

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

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.form-status {
    margin-top: var(--space-4);
    padding: var(--space-3) var(--space-4);
    border-radius: 8px;
    font-size: var(--text-sm);
    display: none;
}

.form-status.success,
.form-status.error {
    display: block;
}

.form-status.success {
    background: rgba(78, 205, 196, 0.1);
    border: 1px solid rgba(78, 205, 196, 0.3);
    color: var(--color-accent-primary);
}

.form-status.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--color-bg-primary);
    border-top: 1px solid rgba(78, 205, 196, 0.1);
    padding: var(--space-8) var(--space-6);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.footer-links {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.footer-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--text-sm);
    transition: var(--transition-fast);
}

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

.footer-divider {
    color: var(--color-text-muted);
}

.back-to-top {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    transition: var(--transition-fast);
}

.back-to-top:hover {
    color: var(--color-accent-primary);
    transform: translateY(-2px);
}

/* ============================================
   DataViz Advisor Page
   ============================================ */
.dataviz-page {
    padding: calc(var(--space-20) + 60px) var(--space-6) var(--space-20);
    min-height: 100vh;
}

/* Wizard visibility — flows and mode selector toggle via JS classList */
#assess-flow.hidden,
#recommend-flow.hidden,
.mode-selector.hidden { display: none; }

/* Mode Selector */
.mode-selector {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
    margin-bottom: var(--space-12);
}

.mode-btn {
    background: var(--color-bg-card);
    border: 1px solid rgba(78, 205, 196, 0.15);
    border-radius: var(--radius-lg);
    padding: var(--space-8) var(--space-6);
    cursor: pointer;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    transition: var(--transition-base);
    font-family: var(--font-primary);
    color: var(--color-text-primary);
}

.mode-btn:hover {
    border-color: rgba(78, 205, 196, 0.4);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

[data-theme="light"] .mode-btn {
    border-color: rgba(9, 114, 104, 0.15);
}

[data-theme="light"] .mode-btn:hover {
    border-color: rgba(9, 114, 104, 0.35);
}

.mode-icon {
    font-size: var(--text-4xl);
    line-height: 1;
}

.mode-label {
    font-size: var(--text-lg);
    font-weight: 600;
}

.mode-desc {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.5;
    max-width: 220px;
}

/* File Upload Dropzone */
.assess-dropzone {
    position: relative;
    border: 2px dashed rgba(78, 205, 196, 0.3);
    border-radius: var(--radius-lg);
    padding: var(--space-10) var(--space-6);
    text-align: center;
    cursor: pointer;
    transition: var(--transition-base);
    background: var(--color-bg-card);
    overflow: hidden;
    min-height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.assess-dropzone:hover,
.assess-dropzone:focus-visible {
    border-color: rgba(78, 205, 196, 0.6);
    background: rgba(78, 205, 196, 0.04);
    outline: none;
}

.assess-dropzone.drag-over {
    border-color: var(--color-accent-primary);
    background: rgba(78, 205, 196, 0.08);
}

[data-theme="light"] .assess-dropzone {
    border-color: rgba(9, 114, 104, 0.25);
}

[data-theme="light"] .assess-dropzone:hover {
    border-color: rgba(9, 114, 104, 0.5);
}

.dropzone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    pointer-events: none;
}

.dropzone-icon {
    font-size: var(--text-4xl);
    line-height: 1;
    opacity: 0.6;
}

.dropzone-label {
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--color-text-secondary);
    margin: 0;
}

.dropzone-hint {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin: 0;
}

.assess-preview {
    max-width: 100%;
    max-height: 320px;
    border-radius: var(--radius-md);
    object-fit: contain;
    display: block;
    margin: 0 auto;
}
.assess-preview.hidden,
.dropzone-content.hidden,
.file-error.hidden { display: none; }

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

.file-error {
    color: var(--color-accent-secondary);
    font-size: var(--text-sm);
    margin-top: var(--space-2);
}

.optional-label {
    color: var(--color-text-muted);
    font-weight: 400;
    text-transform: none;
    letter-spacing: 0;
    font-size: var(--text-xs);
}

.required-label {
    color: var(--color-accent-secondary);
}

.field-hint {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    margin-top: var(--space-2);
    margin-bottom: 0;
}

.chip-group {
    margin-bottom: var(--space-8);
}

/* Toggle (color accessibility) */
.toggle-label {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    cursor: pointer;
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    user-select: none;
}

.toggle-checkbox {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-track {
    display: inline-block;
    width: 40px;
    height: 22px;
    background: var(--color-bg-secondary);
    border-radius: 11px;
    border: 1px solid rgba(78, 205, 196, 0.2);
    position: relative;
    flex-shrink: 0;
    transition: var(--transition-fast);
}

.toggle-track::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    background: var(--color-text-muted);
    border-radius: 50%;
    top: 2px;
    left: 2px;
    transition: var(--transition-fast);
}

.toggle-checkbox:checked + .toggle-track {
    background: var(--color-accent-primary);
    border-color: var(--color-accent-primary);
}

.toggle-checkbox:checked + .toggle-track::after {
    transform: translateX(18px);
    background: var(--color-bg-primary);
}

.toggle-checkbox:focus-visible + .toggle-track {
    outline: 2px solid var(--color-accent-primary);
    outline-offset: 2px;
}

/* Assess Results */
.assess-summary {
    display: flex;
    align-items: flex-start;
    gap: var(--space-6);
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(78, 205, 196, 0.15);
    padding: var(--space-6);
    margin-bottom: var(--space-6);
}

.assess-score {
    display: flex;
    align-items: baseline;
    gap: var(--space-1);
    flex-shrink: 0;
}

.score-number {
    font-family: var(--font-mono);
    font-size: var(--text-4xl);
    font-weight: 600;
    color: var(--color-accent-primary);
    line-height: 1;
}

.score-label {
    font-size: var(--text-xl);
    color: var(--color-text-muted);
}

.assess-overall {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
    padding-top: var(--space-2);
}

/* Feedback Cards */
.feedback-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.feedback-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(78, 205, 196, 0.1);
    border-left-width: 4px;
    padding: var(--space-5) var(--space-6);
}

.feedback-card.severity-high {
    border-left-color: var(--color-accent-secondary);
}

.feedback-card.severity-medium {
    border-left-color: var(--color-accent-tertiary);
}

.feedback-card.severity-low {
    border-left-color: rgba(78, 205, 196, 0.5);
}

.feedback-card.severity-good {
    border-left-color: var(--color-accent-primary);
}

.feedback-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-3);
}

.feedback-category {
    font-size: var(--text-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-primary);
}

.severity-badge {
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 2px var(--space-2);
    border-radius: var(--radius-sm);
}

.severity-badge-high {
    background: rgba(255, 107, 107, 0.15);
    color: var(--color-accent-secondary);
}

.severity-badge-medium {
    background: rgba(255, 230, 109, 0.15);
    color: var(--color-accent-tertiary);
}

.severity-badge-low {
    background: rgba(78, 205, 196, 0.1);
    color: var(--color-text-muted);
}

.severity-badge-good {
    background: rgba(78, 205, 196, 0.15);
    color: var(--color-accent-primary);
}

[data-theme="light"] .severity-badge-medium {
    color: var(--color-accent-tertiary);
}

.feedback-issue {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2);
    line-height: 1.6;
}

.feedback-suggestion {
    font-size: var(--text-sm);
    color: var(--color-text-primary);
    line-height: 1.6;
    margin: 0;
    padding-left: var(--space-4);
    border-left: 2px solid rgba(78, 205, 196, 0.3);
}

/* Recommendation Results */
.rec-primary-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(78, 205, 196, 0.25);
    padding: var(--space-6);
    margin-bottom: var(--space-6);
}

.rec-section-label {
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.rec-chart-type {
    font-size: var(--text-2xl);
    font-weight: 600;
    color: var(--color-accent-primary);
    margin-bottom: var(--space-3);
}

.rec-rationale {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-4);
}

.rec-tips {
    font-size: var(--text-sm);
    color: var(--color-text-primary);
    line-height: 1.6;
    margin: 0;
    padding: var(--space-3) var(--space-4);
    background: rgba(78, 205, 196, 0.06);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--color-accent-primary);
}

.rec-alternatives {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(78, 205, 196, 0.1);
    padding: var(--space-5) var(--space-6);
    margin-bottom: var(--space-6);
}

.rec-alt-item {
    display: flex;
    gap: var(--space-4);
    padding: var(--space-3) 0;
    border-bottom: 1px solid rgba(78, 205, 196, 0.07);
}

.rec-alt-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.rec-alt-type {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-primary);
    min-width: 160px;
    flex-shrink: 0;
}

.rec-alt-when {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.rec-palette-section {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(78, 205, 196, 0.1);
    padding: var(--space-5) var(--space-6);
    margin-bottom: var(--space-6);
}

.rec-palette-name {
    font-size: var(--text-base);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.rec-palette-notes {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
}

.rec-best-practices {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(78, 205, 196, 0.1);
    padding: var(--space-5) var(--space-6);
}

.best-practices-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    margin: 0;
    padding: 0;
}

.best-practices-list li {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    line-height: 1.6;
    padding-left: var(--space-5);
    position: relative;
}

.best-practices-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-accent-primary);
    font-weight: 600;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 900px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-visual {
        display: none;
    }

    .hero-name {
        font-size: var(--text-4xl);
    }

    .hero-subtitle {
        margin: 0 auto;
    }

    .about-top {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .about-photo {
        order: -1;
        margin-bottom: var(--space-6);
    }

    .about-photo img {
        max-width: 220px;
    }

    .about-main {
        text-align: left;
    }

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

    .publication-card {
        grid-template-columns: 1fr;
        gap: var(--space-3);
    }

    .publication-meta {
        flex-direction: row;
        align-items: baseline;
        gap: var(--space-4);
    }

    .publication-year {
        font-size: var(--text-xl);
    }

}

@media (max-width: 600px) {
    .nav-toggle {
        display: flex;
    }

    .nav-container {
        padding: var(--space-3) var(--space-4);
    }

    .nav-links {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg-secondary);
        border-top: 1px solid transparent;
        border-bottom: 1px solid transparent;
        padding: 0 var(--space-6);
        gap: var(--space-2);
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-slow), padding var(--transition-slow), border-color var(--transition-slow);
    }

    .nav-links.open {
        max-height: 400px;
        padding: var(--space-4) var(--space-6);
        border-top-color: rgba(78, 205, 196, 0.1);
        border-bottom-color: rgba(78, 205, 196, 0.1);
    }

    .nav-link {
        font-size: var(--text-sm);
        padding: var(--space-3) var(--space-4);
    }

    .hero-name {
        font-size: var(--text-3xl);
    }

    .hero-tagline {
        font-size: var(--text-xl);
    }

    .section-title {
        font-size: var(--text-2xl);
    }

    .about-lead {
        font-size: var(--text-lg);
    }

    .footer-container {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }

    .work-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }

    .work-cta {
        flex-direction: column;
        text-align: center;
        padding: var(--space-4);
    }

    .mode-selector {
        grid-template-columns: 1fr;
    }

    .assess-summary {
        flex-direction: column;
        gap: var(--space-3);
    }

    .rec-alt-type {
        min-width: 120px;
    }
}

/* ============================================
   Scroll Entrance Animations
   ============================================ */
.animate-hidden {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   Accessibility & Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}

/* Focus States for Accessibility */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--color-accent-primary);
    outline-offset: 2px;
}

/* ============================================
   Recommendation Page
   ============================================ */
.recommend-page {
    padding: calc(var(--space-20) + 60px) var(--space-6) var(--space-20);
    min-height: 100vh;
}

.recommend-back-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--text-sm);
    font-weight: 500;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.recommend-back-link:hover {
    color: var(--color-accent-primary);
}

/* Step Indicator */
.step-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    margin-bottom: var(--space-12);
}

.step-indicator .step {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-muted);
    transition: var(--transition-fast);
}

.step-indicator .step span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--color-bg-card);
    border: 2px solid var(--color-text-muted);
    font-size: var(--text-sm);
    font-weight: 600;
    transition: var(--transition-fast);
}

.step-indicator .step.active {
    color: var(--color-accent-primary);
}

.step-indicator .step.active span {
    background: var(--color-accent-primary);
    border-color: var(--color-accent-primary);
    color: var(--color-bg-primary);
}

.step-line {
    width: 40px;
    height: 2px;
    background: var(--color-text-muted);
    opacity: 0.3;
}

/* Wizard Steps */
.wizard-step {
    max-width: 800px;
    margin: 0 auto;
}

.wizard-step.hidden {
    display: none;
}

.step-title {
    font-size: var(--text-2xl);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.step-subtitle {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-8);
}

/* Genre Chips */
.genre-grid {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-bottom: var(--space-8);
}

.genre-chip {
    background: rgba(78, 205, 196, 0.1);
    color: var(--color-accent-primary);
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: 500;
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition-fast);
    font-family: var(--font-primary);
}

.genre-chip:hover {
    background: rgba(78, 205, 196, 0.2);
}

.genre-chip.selected {
    background: var(--color-accent-primary);
    color: var(--color-bg-primary);
    border-color: var(--color-accent-primary);
}

[data-theme="light"] .genre-chip {
    background: rgba(9, 114, 104, 0.1);
    color: var(--color-accent-primary);
}

[data-theme="light"] .genre-chip:hover {
    background: rgba(9, 114, 104, 0.2);
}

[data-theme="light"] .genre-chip.selected {
    background: var(--color-accent-primary);
    color: #fff;
}

/* Seed Books */
.seed-books {
    margin-bottom: var(--space-8);
}

.seed-books-label {
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-4);
    font-weight: 600;
}

.seed-books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: var(--space-4);
}

.seed-book {
    background: var(--color-bg-card);
    border: 2px solid rgba(78, 205, 196, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--space-2);
    cursor: pointer;
    transition: var(--transition-base);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-primary);
}

.seed-book img {
    width: 100%;
    aspect-ratio: 5 / 6;
    object-fit: contain;
    border-radius: var(--radius-sm);
    background: var(--color-bg-secondary);
}

.seed-book-title {
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
    line-height: 1.3;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 100%;
}

.seed-book:hover {
    border-color: rgba(78, 205, 196, 0.3);
    transform: translateY(-2px);
}

.seed-book.selected {
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 0 1px var(--color-accent-primary), var(--shadow-glow);
}

[data-theme="light"] .seed-book {
    border-color: rgba(9, 114, 104, 0.15);
}

[data-theme="light"] .seed-book:hover {
    border-color: rgba(9, 114, 104, 0.3);
}

[data-theme="light"] .seed-book.selected {
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 0 1px var(--color-accent-primary), var(--shadow-glow);
}

/* Book Inputs */
.book-inputs {
    margin-bottom: var(--space-8);
}

.book-input-group {
    margin-bottom: var(--space-3);
}

.book-input-wrapper {
    position: relative;
}

.book-input {
    width: 100%;
    background: var(--color-bg-card);
    border: 1px solid rgba(78, 205, 196, 0.15);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    font-family: var(--font-primary);
    font-size: var(--text-base);
    color: var(--color-text-primary);
    transition: var(--transition-fast);
}

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

.book-input:focus {
    outline: none;
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 0 3px rgba(78, 205, 196, 0.1);
}

[data-theme="light"] .book-input {
    border-color: rgba(9, 114, 104, 0.2);
}

[data-theme="light"] .book-input:focus {
    box-shadow: 0 0 0 3px rgba(9, 114, 104, 0.15);
}

/* Autocomplete Dropdown */
.autocomplete-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg-card);
    border: 1px solid rgba(78, 205, 196, 0.2);
    border-radius: var(--radius-md);
    margin-top: var(--space-1);
    z-index: 100;
    box-shadow: var(--shadow-lg);
    max-height: 200px;
    overflow-y: auto;
}

.autocomplete-dropdown.hidden {
    display: none;
}

.autocomplete-item {
    display: block;
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-primary);
    font-size: var(--text-sm);
    color: var(--color-text-primary);
    background: transparent;
    border: none;
    text-align: left;
    cursor: pointer;
    transition: var(--transition-fast);
}

.autocomplete-item:hover {
    background: rgba(78, 205, 196, 0.1);
}

.autocomplete-item + .autocomplete-item {
    border-top: 1px solid rgba(78, 205, 196, 0.05);
}

.add-book-btn {
    background: transparent;
    border: 1px dashed var(--color-text-muted);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-primary);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    cursor: pointer;
    transition: var(--transition-fast);
    width: 100%;
}

.add-book-btn:hover {
    border-color: var(--color-accent-primary);
    color: var(--color-accent-primary);
}

/* Selected Books Summary */
.selected-books-summary {
    margin-bottom: var(--space-8);
}

.selected-books-summary.hidden {
    display: none;
}

.selected-books-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.selected-books-list li {
    background: rgba(78, 205, 196, 0.15);
    color: var(--color-accent-primary);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.remove-book-btn {
    background: transparent;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    font-size: var(--text-sm);
    padding: 0 var(--space-1);
    line-height: 1;
    font-family: var(--font-primary);
    transition: var(--transition-fast);
}

.remove-book-btn:hover {
    color: var(--color-accent-secondary);
}

/* Wizard Buttons */
.wizard-buttons {
    display: flex;
    gap: var(--space-4);
    justify-content: space-between;
}

.wizard-back {
    background: transparent;
    border: 1px solid var(--color-text-muted);
    color: var(--color-text-secondary);
}

.wizard-back:hover {
    border-color: var(--color-accent-primary);
    color: var(--color-accent-primary);
    transform: none;
    box-shadow: none;
}

.wizard-next:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
}

/* Loading State */
.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-20) 0;
}

.loading-state.hidden {
    display: none;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(78, 205, 196, 0.2);
    border-top-color: var(--color-accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-text {
    margin-top: var(--space-4);
    color: var(--color-text-secondary);
    font-size: var(--text-lg);
}

/* Error State */
.error-state {
    text-align: center;
    padding: var(--space-12) 0;
}

.error-state.hidden {
    display: none;
}

.error-text {
    color: var(--color-accent-secondary);
    font-size: var(--text-lg);
    margin-bottom: var(--space-6);
}

/* Results */
.results-state.hidden {
    display: none;
}

.recommendations-grid {
    display: grid;
    gap: var(--space-6);
    margin-bottom: var(--space-8);
}

.recommendation-card {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: var(--space-6);
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(78, 205, 196, 0.1);
    padding: var(--space-6);
    transition: var(--transition-base);
}

.recommendation-card:hover {
    border-color: rgba(78, 205, 196, 0.25);
    box-shadow: var(--shadow-glow);
}

[data-theme="light"] .recommendation-card {
    border-color: rgba(9, 114, 104, 0.15);
}

[data-theme="light"] .recommendation-card:hover {
    border-color: rgba(9, 114, 104, 0.3);
}

.rec-cover img {
    width: 100%;
    aspect-ratio: 5 / 6;
    object-fit: contain;
    border-radius: var(--radius-md);
    background: var(--color-bg-secondary);
}

.rec-cover .book-card-fallback {
    width: 100%;
    aspect-ratio: 5 / 6;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--space-3);
    background: var(--color-bg-secondary);
    color: var(--color-text-secondary);
    font-size: var(--text-xs);
    font-weight: 500;
    line-height: 1.4;
    border-radius: var(--radius-md);
}

.rec-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.rec-title {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-1);
}

.rec-author {
    color: var(--color-accent-primary);
    font-size: var(--text-sm);
    font-weight: 500;
    margin-bottom: var(--space-3);
}

.rec-reason {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    line-height: 1.6;
    font-style: italic;
}

/* Readings CTA */
.readings-cta {
    margin-top: var(--space-12);
    padding: var(--space-6) var(--space-8);
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(78, 205, 196, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-6);
}

.readings-cta p {
    color: var(--color-text-secondary);
    font-size: var(--text-lg);
    margin: 0;
}

.recommend-btn {
    display: inline-block;
    background: var(--gradient-accent);
    color: var(--color-bg-primary);
    text-decoration: none;
    border-radius: var(--radius-md);
    padding: var(--space-4) var(--space-8);
    font-weight: 600;
    font-size: var(--text-base);
    transition: var(--transition-base);
}

.recommend-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(78, 205, 196, 0.3);
}

/* Responsive - Recommendation Page */
@media (max-width: 600px) {
    .recommend-page {
        padding-top: var(--space-8);
    }

    .recommendation-card {
        grid-template-columns: 1fr;
        gap: var(--space-3);
        padding: var(--space-4);
        text-align: center;
    }

    .rec-cover img,
    .rec-cover .book-card-fallback {
        max-width: 120px;
        margin: 0 auto;
    }

    .rec-info {
        align-items: center;
    }

    .seed-books-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .genre-grid {
        gap: var(--space-2);
    }

    .genre-chip {
        padding: var(--space-2) var(--space-4);
        font-size: var(--text-xs);
    }

    .step-indicator {
        gap: var(--space-2);
        font-size: var(--text-xs);
    }

    .wizard-buttons {
        flex-direction: column;
        gap: var(--space-3);
    }

    .wizard-buttons .submit-btn {
        width: 100%;
        text-align: center;
    }

    .readings-cta {
        flex-direction: column;
        text-align: center;
        padding: var(--space-4);
    }

    .nav-right {
        gap: var(--space-3);
    }

    .nav-logo {
        font-size: var(--text-base);
    }

    .recommend-back-link {
        font-size: var(--text-xs);
        padding: var(--space-1) var(--space-2);
    }
}