/* ==========================================================================
   Masa Hsin-Lung Tu Portfolio CSS Stylesheet
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design System & Variables
   -------------------------------------------------------------------------- */
:root {
    /* Fonts */
    --font-heading: 'Outfit', 'Noto Sans TC', sans-serif;
    --font-body: 'Inter', 'Noto Sans TC', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Spacing */
    --container-width: 1200px;
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
}

/* Dark Theme Variables (Default) */
body.dark-theme {
    --bg-body: #0b0f19;
    --bg-surface: #121826;
    --bg-surface-hover: #1b2336;
    --bg-navbar: rgba(11, 15, 25, 0.85);
    --bg-input: #1b2336;
    
    --border-color: rgba(255, 255, 255, 0.08);
    --border-color-hover: rgba(255, 255, 255, 0.16);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    /* Accent Colors */
    --accent-tech: #3b82f6;      /* Blue */
    --accent-tech-glow: rgba(59, 130, 246, 0.25);
    
    --accent-lit: #ec4899;       /* Pink */
    --accent-lit-glow: rgba(236, 72, 153, 0.25);
    
    --accent-run: #10b981;       /* Emerald Green */
    --accent-run-glow: rgba(16, 185, 129, 0.25);
    
    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #ec4899 50%, #10b981 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.5);
    --shadow-glow-tech: 0 8px 30px rgba(59, 130, 246, 0.15);
}

/* Light Theme Variables */
body.light-theme {
    --bg-body: #f8fafc;
    --bg-surface: #ffffff;
    --bg-surface-hover: #f1f5f9;
    --bg-navbar: rgba(248, 250, 252, 0.85);
    --bg-input: #f1f5f9;
    
    --border-color: rgba(0, 0, 0, 0.08);
    --border-color-hover: rgba(0, 0, 0, 0.16);
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    /* Accent Colors */
    --accent-tech: #2563eb;      /* Deep Blue */
    --accent-tech-glow: rgba(37, 99, 235, 0.15);
    
    --accent-lit: #db2777;       /* Deep Pink */
    --accent-lit-glow: rgba(219, 39, 119, 0.15);
    
    --accent-run: #059669;       /* Deep Emerald */
    --accent-run-glow: rgba(5, 150, 105, 0.15);
    
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #db2777 50%, #059669 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.12);
    --shadow-glow-tech: 0 8px 30px rgba(37, 99, 235, 0.08);
}

/* --------------------------------------------------------------------------
   2. Reset & General Styles
   -------------------------------------------------------------------------- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-body);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

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

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #ffffff !important;
}

.btn-primary:hover {
    opacity: 0.95;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.25);
}

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

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

.btn-mini {
    padding: 6px 14px;
    font-size: 0.85rem;
    border-radius: 4px;
    background: var(--bg-body);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

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

/* --------------------------------------------------------------------------
   3. Navbar Styles
   -------------------------------------------------------------------------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 70px;
    background-color: var(--bg-navbar);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.nav-container {
    max-width: var(--container-width);
    height: 100%;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: 0.5px;
    color: var(--text-primary);
}

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

.nav-menu {
    display: flex;
    gap: 32px;
}

.nav-link {
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-secondary);
    position: relative;
    padding: 8px 0;
    cursor: pointer;
    transition: color var(--transition-fast);
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-normal);
}

.nav-link.active::after, .nav-link:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Theme Toggle Button */
.theme-toggle-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
    background: var(--bg-surface-hover);
    border-color: var(--text-secondary);
}

body.dark-theme .icon-sun { display: none; }
body.dark-theme .icon-moon { display: block; color: var(--accent-tech); }
body.light-theme .icon-sun { display: block; color: #f59e0b; }
body.light-theme .icon-moon { display: none; }

/* Mobile Menu Button */
.hamburger-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: transparent;
    border: none;
    cursor: pointer;
}

.hamburger-btn .bar {
    width: 100%;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

/* --------------------------------------------------------------------------
   4. Hero Section Styles
   -------------------------------------------------------------------------- */
.hero-section {
    position: relative;
    padding: 140px 0 80px 0;
    overflow: hidden;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero-bg-overlay {
    position: absolute;
    top: -10%;
    right: -10%;
    width: 60%;
    height: 80%;
    background: radial-gradient(circle, var(--accent-tech-glow) 0%, transparent 60%);
    z-index: 0;
    pointer-events: none;
}

body.light-theme .hero-bg-overlay {
    background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, transparent 60%);
}

.hero-container {
    position: relative;
    z-index: 1;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    align-items: center;
}

.badge-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 24px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 50px;
    font-family: var(--font-heading);
}

.tech-badge { background: rgba(59, 130, 246, 0.12); color: #60a5fa; border: 1px solid rgba(59, 130, 246, 0.2); }
.lit-badge { background: rgba(236, 72, 153, 0.12); color: #f472b6; border: 1px solid rgba(236, 72, 153, 0.2); }
.run-badge { background: rgba(16, 185, 129, 0.12); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.2); }

body.light-theme .tech-badge { background: rgba(37, 99, 235, 0.08); color: #2563eb; }
body.light-theme .lit-badge { background: rgba(219, 39, 119, 0.08); color: #db2777; }
body.light-theme .run-badge { background: rgba(5, 150, 105, 0.08); color: #059669; }

.hero-title {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.hero-description {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 680px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
}

/* Profile Card Flip animation */
.profile-card-wrapper {
    perspective: 1000px;
    width: 100%;
    max-width: 380px;
    margin: 0 auto;
}

.profile-card {
    position: relative;
    width: 100%;
    height: 440px;
    transform-style: preserve-3d;
    transition: transform 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    cursor: pointer;
}

.profile-card.flipped {
    transform: rotateY(180deg);
}

.card-front, .card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 36px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    box-shadow: var(--shadow-lg);
    transition: border-color var(--transition-normal);
}

.card-front:hover, .card-back:hover {
    border-color: var(--border-color-hover);
}

.card-back {
    transform: rotateY(180deg);
    justify-content: center;
}

/* Card Front Content */
.profile-avatar {
    width: 110px;
    height: 110px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: #ffffff;
    margin-bottom: 24px;
    box-shadow: var(--shadow-md);
}

.profile-name {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.profile-title {
    font-size: 0.95rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 28px;
    font-weight: 500;
}

.profile-meta {
    width: 100%;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 0;
    margin-bottom: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.profile-meta span {
    display: flex;
    align-items: center;
    gap: 10px;
}

.profile-meta i {
    width: 16px;
    color: var(--accent-tech);
}

.profile-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.profile-tags span {
    font-size: 0.8rem;
    background: var(--bg-surface-hover);
    padding: 4px 10px;
    border-radius: 4px;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.card-hint {
    margin-top: auto;
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Card Back Content */
.card-back h3 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    margin-bottom: 24px;
    text-align: center;
}

.stats-mini-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px 20px;
    width: 100%;
    margin-bottom: 28px;
}

.mini-stat-item {
    background: var(--bg-surface-hover);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 12px;
    text-align: center;
}

.mini-stat-num {
    display: block;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-tech);
}

.mini-stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: block;
    margin-top: 4px;
}

.special-achievements {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.achievement-pill {
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(16, 185, 129, 0.08);
    color: var(--accent-run);
    padding: 8px 12px;
    border-radius: var(--border-radius-sm);
    border: 1px solid rgba(16, 185, 129, 0.15);
}

/* --------------------------------------------------------------------------
   5. Dynamic Tabs Layout
   -------------------------------------------------------------------------- */
.tabs-nav-bar {
    position: sticky;
    top: 70px;
    background-color: var(--bg-navbar);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 900;
    padding: 12px 0;
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.tabs-nav {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 12px;
}

.tab-btn {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    padding: 14px 24px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: all var(--transition-fast);
}

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

/* Active Tab Themes */
.tab-btn.active[data-tab="tech"] {
    background-color: var(--accent-tech);
    color: #ffffff;
    border-color: var(--accent-tech);
    box-shadow: 0 4px 15px var(--accent-tech-glow);
}

.tab-btn.active[data-tab="lit"] {
    background-color: var(--accent-lit);
    color: #ffffff;
    border-color: var(--accent-lit);
    box-shadow: 0 4px 15px var(--accent-lit-glow);
}

.tab-btn.active[data-tab="running"] {
    background-color: var(--accent-run);
    color: #ffffff;
    border-color: var(--accent-run);
    box-shadow: 0 4px 15px var(--accent-run-glow);
}

.tab-content-wrapper {
    padding: 60px 24px 80px 24px;
}

.tab-content {
    display: none;
    animation: fadeIn var(--transition-slow);
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

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

.section-header h2 {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.tech-sub-section, .lit-sub-section, .running-sub-section {
    margin-top: 60px;
    border-top: 1px solid var(--border-color);
    padding-top: 50px;
}

.sub-section-title {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.sub-section-intro {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 36px;
    max-width: 850px;
}

/* --------------------------------------------------------------------------
   6. Tech Tab Component Styles
   -------------------------------------------------------------------------- */
/* Stats Dashboard */
.stats-dashboard {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.stat-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 30px 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-tech);
    box-shadow: var(--shadow-glow-tech);
}

.stat-card i {
    font-size: 2rem;
    color: var(--accent-tech);
    margin-bottom: 16px;
}

.stat-number {
    display: block;
    font-family: var(--font-heading);
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.2;
}

.stat-label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 8px;
}

/* Projects Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.project-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-color-hover);
    box-shadow: var(--shadow-lg);
}

.project-img-container {
    position: relative;
    height: 200px;
    overflow: hidden;
    background-color: var(--bg-surface-hover);
    border-bottom: 1px solid var(--border-color);
}

.project-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.project-card:hover .project-img {
    transform: scale(1.05);
}

.project-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.project-tag {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent-tech);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
    display: inline-block;
}

.project-body h4 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.version-tag {
    font-size: 0.8rem;
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-tech);
    padding: 2px 8px;
    border-radius: 4px;
    margin-left: 6px;
    font-weight: 500;
}

.project-body p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Timeline Component */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 8px;
    width: 2px;
    height: 100%;
    background-color: var(--border-color);
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: -30px;
    top: 6px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background-color: var(--bg-body);
    border: 3px solid var(--accent-tech);
    z-index: 2;
}

.timeline-date {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--accent-tech);
    margin-bottom: 6px;
}

.timeline-content {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 20px 24px;
}

.timeline-content h4 {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.company-detail {
    font-size: 0.92rem;
    color: var(--text-secondary);
}

/* Patent Filtering */
.patent-filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 24px;
}

.filter-btn {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

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

.filter-btn.active {
    background: var(--accent-tech);
    color: #ffffff;
    border-color: var(--accent-tech);
}

.patents-list-container {
    max-height: 480px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 16px 20px;
    background-color: var(--bg-surface);
    margin-bottom: 40px;
}

/* Style Scrollbar for Patents List */
.patents-list-container::-webkit-scrollbar {
    width: 6px;
}
.patents-list-container::-webkit-scrollbar-track {
    background: var(--bg-surface);
}
.patents-list-container::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.patent-item {
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.patent-item:last-child {
    border-bottom: none;
}

.patent-info {
    flex-grow: 1;
}

.patent-title {
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.patent-id {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.patent-loc-tag {
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 600;
}

.patent-loc-tag.us { background: rgba(59, 130, 246, 0.1); color: var(--accent-tech); }
.patent-loc-tag.tw { background: rgba(236, 72, 153, 0.1); color: var(--accent-lit); }
.patent-loc-tag.cn { background: rgba(245, 158, 11, 0.1); color: #f59e0b; }


/* Academic Papers */
.academic-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 16px;
    margin-top: 32px;
}

.papers-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.paper-item {
    background-color: var(--bg-surface);
    border-left: 3px solid var(--accent-tech);
    padding: 16px 20px;
    border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
    border-top: 1px solid var(--border-color);
    border-right: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.paper-title {
    font-weight: 600;
    font-size: 0.98rem;
    margin-bottom: 6px;
}

.paper-meta {
    font-size: 0.82rem;
    color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   7. Literature Tab Component Styles
   -------------------------------------------------------------------------- */
/* Books Showcase */
.sub-section-header-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 8px;
}

.btn-toggle-all {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-weight: 600;
    cursor: pointer;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.btn-toggle-all:hover {
    background: var(--bg-surface-hover);
    border-color: var(--accent-lit);
    color: var(--accent-lit);
}

.books-showcase-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.book-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.book-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-lit);
    box-shadow: 0 10px 25px rgba(236, 72, 153, 0.08);
}

.book-card-header {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.book-cover-container {
    height: 220px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--bg-body);
    border-radius: var(--border-radius-sm);
    padding: 12px;
    margin-bottom: 2px;
    overflow: hidden;
}

.book-cover {
    height: 100%;
    max-width: 100%;
    object-fit: contain;
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15), 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: transform var(--transition-normal);
    cursor: zoom-in;
}

.book-card:hover .book-cover {
    transform: scale(1.03) rotate(1deg);
}

.book-badge {
    align-self: flex-start;
    font-size: 0.75rem;
    font-weight: 700;
    background: rgba(236, 72, 153, 0.1);
    color: var(--accent-lit);
    padding: 3px 10px;
    border-radius: 50px;
}

.book-title-group {
    min-height: 50px;
}

.book-title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    line-height: 1.35;
}

.book-subtitle {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 3px;
}

.book-toggle-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background-color: var(--bg-body);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-top: auto;
}

.book-toggle-btn:hover {
    background-color: var(--bg-surface-hover);
    border-color: var(--accent-lit);
    color: var(--accent-lit);
}

.book-toggle-btn .book-toggle-icon {
    font-size: 0.75rem;
    transition: transform 0.3s ease;
}

.book-card.is-expanded .book-toggle-btn {
    background-color: rgba(236, 72, 153, 0.08);
    border-color: var(--accent-lit);
    color: var(--accent-lit);
}

.book-card.is-expanded .book-toggle-btn .book-toggle-icon {
    transform: rotate(180deg);
}

.book-collapsible-body {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.4s cubic-bezier(0, 1, 0, 1), opacity 0.3s ease, margin-top 0.3s ease;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.book-card.is-expanded .book-collapsible-body {
    max-height: 1500px;
    opacity: 1;
    margin-top: 4px;
    transition: max-height 0.5s ease-in-out, opacity 0.3s ease, margin-top 0.3s ease;
}

.book-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.55;
}

.book-target {
    font-size: 0.8rem;
    color: var(--text-muted);
    background: var(--bg-body);
    padding: 8px 10px;
    border-radius: var(--border-radius-sm);
    border: 1px dashed var(--border-color);
}

.book-links-wrapper {
    display: flex;
    flex-direction: column;
    gap: 8px;
    border-top: 1px solid var(--border-color);
    padding-top: 12px;
}

.book-purchase-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.book-link {
    font-size: 0.8rem;
    text-align: center;
    background: var(--bg-surface-hover);
    border: 1px solid var(--border-color);
    padding: 6px 0;
    border-radius: 4px;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.book-link:hover {
    border-color: var(--accent-lit);
    color: var(--text-primary);
}

/* Literature Awards Timeline */
.awards-timeline-container {
    max-height: 500px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    background-color: var(--bg-surface);
    padding: 24px;
}

.awards-timeline-container::-webkit-scrollbar {
    width: 6px;
}
.awards-timeline-container::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.award-item {
    position: relative;
    padding-left: 24px;
    padding-bottom: 20px;
    border-left: 2px solid var(--border-color);
}

.award-item:last-child {
    border-left-color: transparent;
    padding-bottom: 0;
}

.award-item::before {
    content: '';
    position: absolute;
    left: -7px;
    top: 5px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--accent-lit);
    border: 2px solid var(--bg-surface);
}

.award-year {
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--accent-lit);
    margin-bottom: 2px;
}

.award-name {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.award-work {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* Lyricist Card */
.lyricist-card {
    background: linear-gradient(135deg, rgba(236, 72, 153, 0.08) 0%, rgba(59, 130, 246, 0.08) 100%);
    border: 1px solid rgba(236, 72, 153, 0.15);
    border-radius: var(--border-radius-md);
    padding: 28px;
    display: flex;
    gap: 24px;
    margin-bottom: 40px;
}

.lyricist-icon {
    font-size: 2.2rem;
    color: var(--accent-lit);
    display: flex;
    align-items: center;
}

.lyricist-content h4 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.lyricist-content p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    margin-bottom: 14px;
}

/* Video Gallery */
.video-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.video-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.video-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-lit);
    box-shadow: var(--shadow-md);
}

.video-thumbnail-container {
    position: relative;
    height: 160px;
    background-color: #000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.video-thumbnail-container::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: linear-gradient(0deg, rgba(0,0,0,0.6) 0%, transparent 60%);
    z-index: 1;
}

.play-overlay {
    position: absolute;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(236, 72, 153, 0.85);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    z-index: 2;
    transition: transform var(--transition-fast), background var(--transition-fast);
}

.video-card:hover .play-overlay {
    transform: scale(1.1);
    background: var(--accent-lit);
}

.video-card-body {
    padding: 16px;
}

.video-card-body h4 {
    font-size: 0.9rem;
    font-weight: 600;
    line-height: 1.4;
    max-height: 2.8em;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

/* --------------------------------------------------------------------------
   8. Running Tab Component Styles
   -------------------------------------------------------------------------- */
/* Stats Grid */
.running-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.run-stat-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: border-color var(--transition-fast);
}

.run-stat-card:hover {
    border-color: var(--accent-run);
}

.run-stat-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-run);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
}

.run-stat-info {
    display: flex;
    flex-direction: column;
}

.run-stat-num {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
}

.run-stat-lbl {
    font-size: 0.78rem;
    color: var(--text-secondary);
}

/* Running Philosophy & Quote */
.running-philosophy {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 50px;
    align-items: start;
}

.philosophy-quote {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 32px;
    position: relative;
}

.philosophy-quote::before {
    content: '“';
    position: absolute;
    top: 10px;
    left: 20px;
    font-size: 6rem;
    font-family: var(--font-heading);
    color: rgba(16, 185, 129, 0.08);
    line-height: 1;
}

.philosophy-quote blockquote {
    font-size: 1.02rem;
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

.philosophy-photo {
    margin: 28px auto 4px;
    text-align: center;
}

.philosophy-photo img {
    width: 100%;
    max-width: 640px;
    border-radius: var(--border-radius-md);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
    object-fit: cover;
    display: inline-block;
}

@media (max-width: 768px) {
    .philosophy-photo img {
        max-width: 85%;
    }
}

.ultra-highlights-list h4 {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.ultra-highlights-list ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.ultra-highlights-list li {
    font-size: 0.92rem;
    color: var(--text-secondary);
    position: relative;
    padding-left: 20px;
}

.ultra-highlights-list li::before {
    content: '\f105';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    color: var(--accent-run);
}

/* Searchable Race Ledger Table */
.ledger-control-panel {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 16px;
    margin-bottom: 20px;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box i {
    position: absolute;
    left: 16px;
    color: var(--text-muted);
}

.search-box input {
    width: 100%;
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 12px 16px 12px 42px;
    border-radius: var(--border-radius-sm);
    font-size: 0.95rem;
    outline: none;
    transition: all var(--transition-fast);
}

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

.filter-select-wrapper select {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 12px 24px;
    border-radius: var(--border-radius-sm);
    font-size: 0.95rem;
    outline: none;
    cursor: pointer;
    font-family: var(--font-body);
}

.filter-select-wrapper select:focus {
    border-color: var(--accent-run);
}

.table-responsive {
    width: 100%;
    overflow-x: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background-color: var(--bg-surface);
}

.race-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.9rem;
}

.race-table th {
    background-color: var(--bg-surface-hover);
    padding: 14px 16px;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
}

.race-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

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

.race-table tr:hover td {
    background-color: var(--bg-surface-hover);
    color: var(--text-primary);
}

.race-type-badge {
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 600;
}

.race-type-badge.ultra { background: rgba(16, 185, 129, 0.1); color: var(--accent-run); }
.race-type-badge.full { background: rgba(59, 130, 246, 0.1); color: var(--accent-tech); }
.race-type-badge.half { background: rgba(245, 158, 11, 0.1); color: #f59e0b; }
.race-type-badge.other { background: rgba(100, 116, 139, 0.1); color: var(--text-secondary); }

/* Pagination */
.pagination-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 24px;
}

.page-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    background: var(--bg-surface);
    color: var(--text-secondary);
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: all var(--transition-fast);
}

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

.page-btn.active {
    background: var(--accent-run);
    color: #ffffff;
    border-color: var(--accent-run);
}

.page-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* Mountain Climbing Map iframe styling */
.map-iframe-container {
    position: relative;
    width: 100%;
    height: 600px;
    border-radius: var(--border-radius-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
    margin-bottom: 40px;
    box-shadow: var(--shadow-sm);
    background: var(--bg-surface);
}

.map-iframe-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

@media (max-width: 768px) {
    .map-iframe-container {
        height: 500px;
    }
}

/* --------------------------------------------------------------------------
   9. Extra Section (Blood Donation / Certs)
   -------------------------------------------------------------------------- */
.section-extra {
    padding: 80px 0;
}

.bg-light-section {
    background-color: var(--bg-surface-hover);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.extra-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 40px;
}
.extra-title.toggle-trigger {
    cursor: pointer;
    user-select: none;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    transition: color 0.3s ease;
}

.extra-title.toggle-trigger:hover {
    color: var(--accent-lit);
}


.extra-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.extra-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 36px 24px;
    text-align: center;
}

.extra-card-icon {
    font-size: 2.2rem;
    color: var(--accent-lit);
    margin-bottom: 20px;
}

.extra-card:nth-child(2) .extra-card-icon {
    color: var(--accent-tech);
}

.extra-card:nth-child(3) .extra-card-icon {
    color: var(--accent-run);
}

.extra-card h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.extra-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   10. Contact Section Styles
   -------------------------------------------------------------------------- */
.contact-section {
    padding: 90px 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info-block h2 {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 16px;
}

.contact-info-block p {
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-method-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-method-item i {
    font-size: 1.3rem;
    color: var(--accent-tech);
    margin-top: 4px;
}

.contact-method-item h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.contact-method-item p {
    margin-bottom: 0;
    font-size: 0.95rem;
}

.contact-links-block h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.contact-links-block p {
    color: var(--text-secondary);
    margin-bottom: 28px;
}

.social-links-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 20px;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    color: #ffffff;
    transition: opacity var(--transition-fast);
}

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

.yt-btn { background-color: #ff0000; }
.spotify-btn { background-color: #1ed760; color: #000000; }
.fb-btn { background-color: #1877f2; }

/* --------------------------------------------------------------------------
   11. Footer Styles
   -------------------------------------------------------------------------- */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 40px 0;
    text-align: center;
}

.footer p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.footer-sub {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 8px;
}

/* --------------------------------------------------------------------------
   12. Video Modal Styles
   -------------------------------------------------------------------------- */
.video-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.9);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.video-modal.active {
    display: flex;
}

.video-modal-content {
    position: relative;
    width: 100%;
    max-width: 800px;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 24px;
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.iframe-container {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 Aspect Ratio */
    background-color: #000;
    border-radius: var(--border-radius-sm);
    overflow: hidden;
}

.iframe-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.close-modal-btn {
    position: absolute;
    top: -45px;
    right: 0;
    font-size: 2.2rem;
    color: #ffffff;
    background: transparent;
    border: none;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.close-modal-btn:hover {
    color: var(--accent-lit);
}

.modal-video-title {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* --------------------------------------------------------------------------
   12b. Collapsible Sections Styling
   -------------------------------------------------------------------------- */
.sub-section-title.toggle-trigger {
    cursor: pointer;
    user-select: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: color 0.3s ease;
}

.sub-section-title.toggle-trigger:hover {
    color: var(--accent-tech);
}

.toggle-chevron {
    font-size: 1.1rem;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--text-muted);
    transform: rotate(180deg); /* Expanded by default (pointing up) */
}

.collapsible-section.collapsed .toggle-chevron {
    transform: rotate(0deg); /* Collapsed (pointing down) */
}

.collapsible-content {
    display: grid;
    grid-template-rows: 1fr;
    transition: grid-template-rows 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
    opacity: 1;
}

.collapsible-section.collapsed .collapsible-content {
    grid-template-rows: 0fr;
    opacity: 0;
    pointer-events: none;
}

.collapsible-inner {
    overflow: hidden;
    visibility: visible;
    transition: visibility 0.4s step-start;
}

.collapsible-section.collapsed .collapsible-inner {
    visibility: hidden;
    transition: visibility 0.4s step-end;
}


/* --------------------------------------------------------------------------
   13. Responsive Media Queries
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
    .hero-title { font-size: 3rem; }
    .hero-grid { gap: 30px; }
}

@media (max-width: 900px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .badge-row { justify-content: center; }
    .hero-buttons { justify-content: center; }
    .hero-description { margin-left: auto; margin-right: auto; }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .running-philosophy {
        grid-template-columns: 1fr;
    }
    
    .tabs-nav {
        gap: 6px;
    }
    
    .tab-btn {
        padding: 10px 14px;
        font-size: 0.85rem;
        gap: 6px;
    }
}

@media (max-width: 768px) {
    /* Mobile Menu Drawer */
    .hamburger-btn { display: flex; }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        height: calc(100vh - 70px);
        background-color: var(--bg-body);
        flex-direction: column;
        align-items: center;
        padding-top: 40px;
        gap: 24px;
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
        border-top: 1px solid var(--border-color);
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .nav-link {
        font-size: 1.2rem;
    }
    
    .navbar {
        border-bottom: 1px solid var(--border-color);
    }
    
    .ledger-control-panel {
        grid-template-columns: 1fr;
    }
    
    .social-links-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: 2.4rem;
    }
}

@media (max-width: 480px) {
    .tabs-nav {
        grid-template-columns: 1fr;
    }
    
    .tab-btn {
        justify-content: flex-start;
    }
    
    .timeline {
        padding-left: 20px;
    }
    .timeline-dot {
        left: -20px;
        width: 14px;
        height: 14px;
        top: 4px;
    }
    
    .patent-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    
    .patent-loc-tag {
        align-self: flex-start;
    }
    
    .lyricist-card {
        flex-direction: column;
        gap: 16px;
    }
}


/* Image Lightbox Modal Styles */
.project-img-container {
    cursor: zoom-in;
}
.image-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 3000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    transition: opacity 0.3s ease;
}
.image-modal.active {
    display: flex;
    opacity: 1;
}
.image-modal-content {
    max-width: 90%;
    max-height: 85%;
    border-radius: var(--border-radius-md);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    transform: scale(0.9);
    transition: transform 0.3s ease;
    object-fit: contain;
}
.image-modal.active .image-modal-content {
    transform: scale(1);
}
.close-image-modal-btn {
    position: absolute;
    top: 20px;
    right: 30px;
    font-size: 3rem;
    color: rgba(255, 255, 255, 0.7);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: color 0.2s ease, transform 0.2s ease;
    line-height: 1;
}
.close-image-modal-btn:hover {
    color: #ffffff;
    transform: scale(1.1);
}
.image-caption {
    position: absolute;
    bottom: 30px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.1rem;
    font-family: var(--font-heading);
    text-align: center;
    width: 80%;
    max-width: 800px;
}


/* Projects Slider Styles */
.projects-slider-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
}
.projects-grid.slider-mode {
    display: flex;
    overflow-x: auto;
    scroll-behavior: smooth;
    gap: 30px;
    padding: 10px 5px;
    grid-template-columns: none; /* Override grid layout */
    width: 100%;
    /* Hide scrollbar */
    -ms-overflow-style: none;
    scrollbar-width: none;
}
.projects-grid.slider-mode::-webkit-scrollbar {
    display: none;
}
.projects-grid.slider-mode .project-card {
    flex: 0 0 calc(33.333% - 20px);
    min-width: 300px;
    box-sizing: border-box;
}
.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-md);
}
.slider-btn:hover {
    background-color: var(--bg-surface-hover);
    border-color: var(--accent-lit);
    color: var(--accent-lit);
    box-shadow: var(--shadow-lg);
}
.prev-btn {
    left: -25px;
}
.next-btn {
    right: -25px;
}
@media (max-width: 1200px) {
    .prev-btn {
        left: -10px;
    }
    .next-btn {
        right: -10px;
    }
}
@media (max-width: 1024px) {
    .projects-grid.slider-mode .project-card {
        flex: 0 0 calc(50% - 15px);
    }
}
@media (max-width: 768px) {
    .projects-grid.slider-mode .project-card {
        flex: 0 0 100%;
    }
    .slider-btn {
        display: none; /* Native touch swipe on mobile */
    }
}

/* Lecture Table Styles */
.lecture-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.9rem;
}

.lecture-table th {
    background-color: var(--bg-surface-hover);
    padding: 14px 16px;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
}

.lecture-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

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

.lecture-table tr:hover td {
    background-color: var(--bg-surface-hover);
    color: var(--text-primary);
}

/* Lecture Collapsible Toggle */
.lecture-toggle-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    padding: 10px 4px;
    border-radius: 8px;
    transition: background-color 0.2s;
    user-select: none;
}

.lecture-toggle-header:hover {
    background-color: var(--bg-surface-hover);
    padding-left: 10px;
    padding-right: 10px;
}

.lecture-toggle-icon {
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: transform 0.3s ease;
    flex-shrink: 0;
    margin-left: 12px;
}

.lecture-toggle-header[aria-expanded="true"] .lecture-toggle-icon {
    transform: rotate(180deg);
}

.lecture-collapsible {
    overflow: hidden;
    max-height: 0;
    transition: max-height 0.4s ease, opacity 0.3s ease;
    opacity: 0;
}

.lecture-collapsible.is-open {
    max-height: 2000px;
    opacity: 1;
}

/* Lecture Count Badge */
.lecture-count-badge {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-muted);
    background-color: var(--bg-surface-hover);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 1px 9px;
    margin-left: 8px;
    vertical-align: middle;
    letter-spacing: 0.02em;
}