/* =========================================
   Ryan Li Structural Engineering Portfolio
   Light theme, blueprint-inspired
   ========================================= */

:root {
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, monospace;

    /* Base */
    --color-bg: #f7f6f3;
    --color-bg-alt: #eef0ec;
    --color-surface: #ffffff;
    --color-surface-2: #f1f5f9;
    --color-surface-3: #e2e8f0;
    --color-text: #1a1f2e;
    --color-text-secondary: #556277;
    --color-text-muted: #8b99ad;
    --color-accent: #2563eb;
    --color-accent-2: #475569;
    --color-accent-glow: rgba(37, 99, 235, 0.07);
    --color-border: #e2e8f0;
    --color-card: #ffffff;
    --color-grid: rgba(148, 163, 184, 0.12);

    --content-max: 860px;

    --shadow-sm: 0 1px 3px rgba(26, 31, 46, 0.04);
    --shadow-md: 0 4px 20px rgba(26, 31, 46, 0.06);
    --shadow-lg: 0 12px 40px rgba(26, 31, 46, 0.10);

    --radius-sm: 5px;
    --radius-md: 8px;
    --radius-lg: 14px;
    --radius-xl: 20px;

    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.55s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ===== Dark Theme ===== */
[data-theme="dark"] {
    --color-bg: #0f1318;
    --color-bg-alt: #151a21;
    --color-surface: #1a2027;
    --color-surface-2: #232a33;
    --color-surface-3: #2d3640;
    --color-text: #e7ebf2;
    --color-text-secondary: #9aa8bd;
    --color-text-muted: #6b7a90;
    --color-accent: #6ea8ff;
    --color-accent-2: #8b99ad;
    --color-accent-glow: rgba(110, 168, 255, 0.12);
    --color-border: #2d3640;
    --color-card: #1a2027;
    --color-grid: rgba(139, 165, 190, 0.14);

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.55);
}

/* ===== Section Themes ===== */
[data-section-theme="default"] { background: var(--color-bg); }
[data-section-theme="surface"] { background: var(--color-surface); }
[data-section-theme="alt"]    { background: var(--color-bg-alt); }

/* ===== Reset ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-primary);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
::selection { background: var(--color-accent); color: white; }

/* ===== Simple Top Progress Bar ===== */
.top-progress {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1100;
    height: 3px;
    background: transparent;
    pointer-events: none;
}

.top-progress-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    background: var(--color-accent);
    border-radius: 0 1px 0 0;
    transition: width 0.1s linear;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 14px 0;
    transition: background var(--transition-base), padding var(--transition-base), box-shadow var(--transition-base);
}

.navbar.scrolled {
    padding: 10px 0;
    background: var(--color-bg);
    opacity: 0.95;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--color-border);
}

.nav-container {
    max-width: var(--content-max);
    margin: 0 auto;
    padding: 0 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-weight: 700;
    font-size: 1rem;
    text-decoration: none;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.nav-links { display: flex; align-items: center; gap: 2px; }

.nav-link {
    padding: 7px 12px;
    text-decoration: none;
    color: var(--color-text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}
.nav-link:hover, .nav-link.active {
    color: var(--color-accent);
    background: var(--color-accent-glow);
}
.admin-link { color: var(--color-text-muted); font-size: 0.75rem; }

.theme-toggle {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    width: auto; height: 32px;
    padding: 0 12px;
    margin-left: 6px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all var(--transition-fast);
}
.theme-toggle:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background: var(--color-accent-glow);
}
.theme-toggle i { pointer-events: none; }
.theme-toggle span { font-family: var(--font-primary); font-weight: 500; }

.mobile-menu-btn {
    display: none;
    width: 36px; height: 36px;
    flex-direction: column; align-items: center; justify-content: center; gap: 4px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
}
.mobile-menu-btn span { display: block; width: 18px; height: 2px; background: var(--color-text); transition: all var(--transition-fast); }
.mobile-menu-btn.active span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.active span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.mobile-menu {
    position: fixed;
    top: 56px; left: 0; right: 0; bottom: 0;
    background: var(--color-bg);
    z-index: 999;
    display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 22px;
    transform: translateX(100%);
    transition: transform var(--transition-base);
}
.mobile-menu.active { transform: translateX(0); }
.mobile-link { font-size: 1.3rem; font-weight: 600; color: var(--color-text); text-decoration: none; }

.mobile-theme-toggle {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 10px 22px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    font-family: var(--font-primary);
    font-size: 0.95rem; font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}
.mobile-theme-toggle:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background: var(--color-accent-glow);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 11px 22px; border-radius: var(--radius-md);
    font-weight: 600; font-size: 0.88rem; text-decoration: none;
    cursor: pointer; border: none;
    transition: all var(--transition-fast);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-primary {
    background: var(--color-accent); color: white;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.22);
}
.btn-primary:hover { background: #1d4ed8; box-shadow: 0 6px 20px rgba(37, 99, 235, 0.32); }

.btn-outline {
    background: transparent; color: var(--color-text);
    border: 1.5px solid var(--color-border);
}
.btn-outline:hover { border-color: var(--color-accent); color: var(--color-accent); background: var(--color-accent-glow); }

.btn-sm { padding: 8px 14px; font-size: 0.8rem; }
.btn-full { width: 100%; }
.btn-danger { background: #dc2626; color: white; }
.btn-danger:hover { background: #b91c1c; }

/* ===== Sections ===== */
.section {
    padding: 80px 48px;
    max-width: 100%;
    position: relative;
    transition: background var(--transition-base);
}

.section-inner {
    max-width: var(--content-max);
    margin: 0 auto;
}

.section-header { margin-bottom: 48px; position: relative; max-width: var(--content-max); margin-left: auto; margin-right: auto; padding: 0; }

.section-number {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-accent);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 600;
}

.section-title {
    font-size: clamp(1.7rem, 4vw, 2.4rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 10px;
    color: var(--color-text);
}

.section-subtitle {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    max-width: 560px;
}

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 120px 48px 80px;
    overflow: hidden;
    text-align: center;
}

.blueprint-bg {
    position: absolute; inset: 0; z-index: 0; pointer-events: none; overflow: hidden;
}
.grid-line { position: absolute; background: var(--color-grid); }
.grid-line.line-v { width: 1px; top: 0; bottom: 0; }
.grid-line.line-h { height: 1px; left: 0; right: 0; }
.dimension {
    position: absolute; font-family: var(--font-mono);
    color: var(--color-text-muted); font-size: 0.6rem; letter-spacing: 0.05em;
}
.dim-h { display: flex; align-items: center; gap: 8px; }
.dim-h .dim-line { flex: 1; height: 1px; background: var(--color-grid); }

.hero-content {
    position: relative; z-index: 2;
    max-width: 680px; width: 100%;
}

.hero-badge {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 7px 16px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 50px;
    font-size: 0.78rem; color: var(--color-text-secondary);
    margin-bottom: 28px;
    box-shadow: var(--shadow-sm);
}
.hero-badge i { color: var(--color-accent); font-size: 0.8rem; }

.hero-title {
    font-size: clamp(2.8rem, 8vw, 4.8rem);
    font-weight: 800;
    letter-spacing: -0.05em;
    line-height: 1;
    color: var(--color-text);
    margin-bottom: 60px;
}

.hero-tagline {
    font-size: clamp(0.95rem, 2vw, 1.1rem);
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: 36px;
    line-height: 1.5;
}

.hero-intro {
    max-width: 620px; margin: 0 auto 36px;
    font-size: 0.95rem; color: var(--color-text-secondary);
    line-height: 1.8;
    text-align: left;
}

.hero-intro p {
    margin-bottom: 16px;
}

.hero-intro p:last-child {
    margin-bottom: 0;
}

.hero-cta {
    display: flex; gap: 14px; justify-content: center;
    margin-bottom: 52px; flex-wrap: wrap;
}

.hero-stats {
    display: flex; justify-content: center; align-items: stretch; gap: 0;
    flex-wrap: nowrap;
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 14px 8px;
    max-width: 640px;
    margin: 0 auto;
}
.stat-item {
    text-align: center; display: flex; flex-direction: column; align-items: center;
    justify-content: center; gap: 4px; flex: 1 1 0; padding: 0 18px;
    border-right: 1px solid var(--color-border);
}
.stat-item:last-child { border-right: none; }
.stat-item strong {
    font-size: 1.45rem; font-weight: 800; color: var(--color-accent); line-height: 1.1;
}
.stat-item span { font-size: 0.72rem; color: var(--color-text-secondary); line-height: 1.35; }

/* ===== Featured Project ===== */
.featured-project {
    border-radius: var(--radius-xl);
    margin: 0 auto;
    max-width: 100%;
    padding-left: 48px; padding-right: 48px;
}

/* Pull Quote - breaks up text monotony with a memorable callout */
.pull-quote {
    margin: 20px 0;
    padding: 18px 24px;
    border-left: 4px solid var(--color-accent);
    background: var(--color-surface-2);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-size: 1.05rem;
    font-weight: 600;
    line-height: 1.5;
    color: var(--color-text);
    font-style: italic;
}

.featured-pull-quote {
    margin: 16px 0 8px;
    font-size: 1rem;
}

.modal-description .pull-quote {
    margin: 24px 0 20px;
    font-size: 1.1rem;
}

.featured-card {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 40px;
    align-items: start;
    max-width: var(--content-max);
    margin: 0 auto;
}

.featured-media { display: flex; flex-direction: column; gap: 12px; }
.featured-image-main {
    position: relative; border-radius: var(--radius-lg); overflow: hidden;
    aspect-ratio: 4/3; background: var(--color-surface-2);
    border: 1px solid var(--color-border);
}
.featured-image-main img {
    width: 100%; height: 100%; object-fit: cover;
    transition: transform var(--transition-slow);
}
.featured-image-main:hover img { transform: scale(1.03); }
.image-expand {
    position: absolute; top: 14px; right: 14px;
    width: 36px; height: 36px; border-radius: 50%;
    background: rgba(255,255,255,0.95); border: none;
    color: var(--color-text); cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}
.image-expand:hover { background: var(--color-accent); color: white; }

.featured-thumbs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.featured-thumb {
    aspect-ratio: 4/3; border-radius: var(--radius-md); overflow: hidden;
    cursor: pointer; border: 2px solid transparent;
    transition: all var(--transition-fast); background: var(--color-surface-2);
}
.featured-thumb:hover, .featured-thumb.active { border-color: var(--color-accent); }
.featured-thumb img { width: 100%; height: 100%; object-fit: cover; }

.featured-content { display: flex; flex-direction: column; gap: 16px; }
.featured-meta { display: flex; gap: 10px; flex-wrap: wrap; }
.project-category {
    padding: 4px 10px; background: var(--color-accent-glow);
    color: var(--color-accent); border-radius: 50px;
    font-size: 0.7rem; font-weight: 600;
    text-transform: uppercase; letter-spacing: 0.04em;
}
.project-date {
    padding: 4px 10px; background: var(--color-surface-2);
    color: var(--color-text-secondary); border-radius: 50px;
    font-size: 0.7rem; font-weight: 500;
}
.featured-content h3 { font-size: 1.5rem; font-weight: 700; line-height: 1.2; color: var(--color-text); }
.featured-lead { font-size: 0.95rem; color: var(--color-text-secondary); line-height: 1.7; }

.featured-metrics {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
    padding: 18px 6px; background: var(--color-surface-2); border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}
.metric {
    text-align: center; padding: 0 10px;
    border-right: 1px solid var(--color-border);
    display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.metric:last-child { border-right: none; }
.metric-value { display: block; font-size: 1.35rem; font-weight: 800; color: var(--color-accent); line-height: 1; }
.metric-label { font-size: 0.68rem; color: var(--color-text-secondary); text-transform: uppercase; letter-spacing: 0.06em; font-weight: 600; }

.featured-story { display: flex; flex-direction: column; gap: 14px; }
.story-block h4 {
    font-size: 0.92rem; font-weight: 700; margin-bottom: 5px;
    color: var(--color-text); display: flex; align-items: center; gap: 7px;
}
.story-block h4 i { color: var(--color-accent); font-size: 0.82rem; }
.story-block p { font-size: 0.88rem; color: var(--color-text-secondary); line-height: 1.65; }

.featured-skills { display: flex; flex-wrap: wrap; gap: 7px; }
.featured-skills span {
    padding: 5px 10px; background: var(--color-surface-2);
    border: 1px solid var(--color-border); border-radius: 50px;
    font-size: 0.75rem; color: var(--color-text-secondary);
}

.featured-actions { display: flex; gap: 10px; flex-wrap: nowrap; margin-top: 6px; }
.featured-actions .btn { flex: 1 1 auto; white-space: nowrap; padding: 12px 16px; }

/* Featured download area */
.featured-downloads {
    margin-top: 2px; padding: 16px;
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    display: flex; flex-direction: column; gap: 12px;
}
.featured-downloads-title {
    font-size: 0.72rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: 0.08em; color: var(--color-text-secondary);
    display: flex; align-items: center; gap: 7px;
    margin: 0;
}
.featured-downloads-title i { color: var(--color-accent); }
.featured-file-links { display: flex; flex-direction: column; gap: 8px; }
.file-link {
    display: flex; align-items: center; gap: 12px;
    padding: 11px 13px; border-radius: var(--radius-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    text-decoration: none; color: var(--color-text);
    transition: all var(--transition-fast);
}
.file-link:hover { border-color: var(--color-accent); box-shadow: var(--shadow-sm); }
.file-link > i:first-child {
    font-size: 1.15rem; color: var(--color-accent);
    width: 34px; height: 34px; border-radius: 9px;
    display: flex; align-items: center; justify-content: center;
    background: var(--color-accent-glow); flex-shrink: 0;
}
.file-link-text { display: flex; flex-direction: column; gap: 1px; flex: 1 1 auto; min-width: 0; }
.file-link-text strong { font-size: 0.84rem; font-weight: 700; }
.file-link-text small {
    font-size: 0.72rem; color: var(--color-text-secondary);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.file-link-action {
    color: var(--color-text-secondary); font-size: 0.9rem;
    transition: all var(--transition-fast);
}
.file-link:hover .file-link-action { color: var(--color-accent); }

/* ===== Journey ===== */
.journey {
    position: relative;
}

.journey-layout {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 44px;
    max-width: var(--content-max);
    margin: 0 auto;
    align-items: start;
}

.journey-timeline {
    position: relative;
    padding-left: 36px;
}

.journey-timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-accent), var(--color-accent-glow), var(--color-border));
    border-radius: 2px;
}

.journey-step {
    position: relative;
    margin-bottom: 36px;
}

.journey-marker {
    position: absolute;
    left: -36px;
    top: 5px;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--color-surface);
    border: 2px solid var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    font-size: 0.7rem;
    box-shadow: var(--shadow-sm);
    z-index: 1;
}

.journey-card {
    padding: 24px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.journey-card:hover {
    transform: translateX(5px);
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
}

.journey-year {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.07em;
    margin-bottom: 6px;
    font-weight: 600;
}

.journey-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--color-text);
}

.journey-card p {
    color: var(--color-text-secondary);
    font-size: 0.88rem;
    line-height: 1.75;
    margin-bottom: 10px;
}

.journey-card p:last-child { margin-bottom: 0; }

/* Journey Highlight Box */
.journey-highlight {
    margin-top: 32px;
    padding: 28px;
    background: var(--color-surface);
    border: 1px solid var(--color-accent);
    border-left: 4px solid var(--color-accent);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.journey-highlight h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 10px;
}

.journey-highlight h3 i {
    color: var(--color-accent);
    font-size: 1rem;
}

.journey-highlight p {
    font-size: 0.88rem;
    color: var(--color-text-secondary);
    line-height: 1.75;
    margin-bottom: 10px;
}

.journey-highlight p:last-child { margin-bottom: 0; }

.journey-sidebar {
    position: static;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.journey-image-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
    cursor: zoom-in;
}

.journey-image-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.journey-image-card img {
    width: 100%;
    height: 110px;
    object-fit: cover;
    display: block;
}

/* Portrait images get a much taller crop so the vertical composition is preserved */
.journey-image-card.portrait img {
    height: 340px;
}

.journey-image-card p {
    padding: 9px 12px;
    font-size: 0.72rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

/* ===== Journey Lightbox ===== */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: none;
    align-items: center;
    justify-content: center;
    background: rgba(2, 6, 16, 0.92);
    backdrop-filter: blur(4px);
    padding: 40px;
    cursor: zoom-out;
}
.lightbox.open { display: flex; opacity: 1; visibility: visible; }
.lightbox-body {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    max-width: min(90vw, 1000px);
    max-height: 90vh;
    cursor: default;
}
.lightbox-body img {
    max-width: 100%;
    max-height: 76vh;
    object-fit: contain;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    background: #0b1220;
}
.lightbox-caption {
    max-width: 820px;
    text-align: center;
    font-size: 0.95rem;
    color: var(--color-text-on-dark, #e5eaf3);
    line-height: 1.6;
}
.lightbox-close {
    position: absolute;
    top: 18px;
    right: 22px;
    background: none;
    border: none;
    color: #fff;
    font-size: 2.6rem;
    line-height: 1;
    cursor: pointer;
    opacity: 0.85;
    transition: opacity var(--transition-fast);
    z-index: 2;
}
.lightbox-close:hover { opacity: 1; }
.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    font-size: 1.3rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast);
    z-index: 2;
}
.lightbox-nav:hover { background: rgba(255, 255, 255, 0.28); }
.lightbox-prev { left: 20px; }
.lightbox-next { right: 20px; }
@media (max-width: 768px) {
    .lightbox { padding: 24px 14px; }
    .lightbox-body img { max-height: 66vh; }
    .lightbox-nav { width: 40px; height: 40px; }
    .lightbox-prev { left: 6px; }
    .lightbox-next { right: 6px; }
}


.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: var(--content-max);
    margin: 0 auto;
}

.project-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition-base);
}
.project-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
}

.project-image {
    position: relative; aspect-ratio: 16/10; overflow: hidden;
    background: var(--color-surface-2);
}
.project-image img {
    width: 100%; height: 100%; object-fit: cover;
    transition: transform var(--transition-slow);
}
.project-card:hover .project-image img { transform: scale(1.05); }

.project-image-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(to top, rgba(26,31,46,0.7) 0%, transparent 60%);
    display: flex; align-items: flex-end; padding: 16px;
    opacity: 0; transition: opacity var(--transition-base);
}
.project-card:hover .project-image-overlay { opacity: 1; }
.project-image-overlay span {
    color: white; font-weight: 600; font-size: 0.82rem;
    display: flex; align-items: center; gap: 7px;
}

.project-category-badge {
    position: absolute; top: 12px; left: 12px;
    padding: 4px 10px; background: rgba(255,255,255,0.95);
    color: var(--color-accent); border-radius: 50px;
    font-size: 0.65rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: 0.04em;
}

.project-content { padding: 20px; }
.project-content h3 { font-size: 1.05rem; margin-bottom: 8px; font-weight: 700; line-height: 1.3; color: var(--color-text); }
.project-content p { color: var(--color-text-secondary); font-size: 0.85rem; line-height: 1.6; margin-bottom: 14px; }

.project-meta { display: flex; flex-wrap: wrap; gap: 7px; }
.project-meta span {
    padding: 4px 9px; background: var(--color-surface-2);
    border-radius: 50px; font-size: 0.7rem; color: var(--color-text-secondary);
}

.project-link {
    display: inline-flex; align-items: center; gap: 7px;
    color: var(--color-accent); font-weight: 600; font-size: 0.82rem;
    text-decoration: none; margin-top: 14px;
    transition: gap var(--transition-fast);
}
.project-link:hover { gap: 10px; }

/* ===== About ===== */
.about-layout {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 52px;
    align-items: start;
    max-width: var(--content-max);
    margin: 0 auto;
}

.about-bio { }
.about-profile {
    width: 72px; height: 72px; border-radius: 50%; overflow: hidden;
    margin-bottom: 20px; border: 3px solid var(--color-surface);
    box-shadow: var(--shadow-md);
}
.about-profile img { width: 100%; height: 100%; object-fit: cover; }
.about-bio h3 { font-size: 1.5rem; margin-bottom: 16px; font-weight: 700; color: var(--color-text); }
.about-bio p { color: var(--color-text-secondary); margin-bottom: 14px; line-height: 1.75; font-size: 0.9rem; }

/* Insight boxes in About */
.insight-box {
    margin-top: 22px;
    padding: 22px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}
.insight-box h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 8px;
}
.insight-box h4 i { color: var(--color-accent); font-size: 0.85rem; }
.insight-box p { font-size: 0.85rem; color: var(--color-text-secondary); line-height: 1.7; margin-bottom: 0; }

.about-sidebar { display: flex; flex-direction: column; gap: 20px; }
.about-block {
    padding: 20px; background: var(--color-bg);
    border: 1px solid var(--color-border); border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}
.about-block h4 { font-size: 0.9rem; font-weight: 700; margin-bottom: 14px; color: var(--color-text); display: flex; align-items: center; gap: 8px; }
.about-block h4 i { color: var(--color-accent); }

.edu-entry { margin-bottom: 14px; padding-bottom: 14px; border-bottom: 1px solid var(--color-border); }
.edu-entry:last-of-type { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }
.edu-entry strong { display: block; font-weight: 600; color: var(--color-text); margin-bottom: 2px; font-size: 0.92rem; }
.edu-entry span { display: block; font-size: 0.82rem; color: var(--color-text-secondary); }
.edu-entry .edu-date { font-size: 0.73rem; color: var(--color-text-muted); margin-top: 2px; }
.edu-entry .edu-detail { font-size: 0.76rem; color: var(--color-text-muted); margin-top: 3px; line-height: 1.5; }
.coursework-note { margin-top: 14px; font-size: 0.78rem; color: var(--color-text-muted); line-height: 1.55; }

.skill-pills { display: flex; flex-wrap: wrap; gap: 7px; }
.skill-pills span {
    padding: 5px 10px; background: var(--color-surface);
    border: 1px solid var(--color-border); border-radius: 50px;
    font-size: 0.78rem; color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}
.skill-pills span:hover { border-color: var(--color-accent); color: var(--color-accent); background: var(--color-accent-glow); }

.cert-list { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.cert-list li { display: flex; align-items: center; gap: 8px; font-size: 0.82rem; color: var(--color-text-secondary); }
.cert-list li i { color: var(--color-accent); width: 16px; }

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

/* ===== Experience ===== */
.exp-group { margin-bottom: 48px; max-width: var(--content-max); margin-left: auto; margin-right: auto; }
.exp-group:last-child { margin-bottom: 0; }
/* Clear separation between Work Experience and Leadership */
.exp-group + .exp-group { margin-top: 12px; padding-top: 56px; border-top: 1px solid var(--color-border); }

.exp-group-title {
    font-size: 1.15rem; font-weight: 700; margin-bottom: 24px;
    color: var(--color-text); display: flex; align-items: center; gap: 10px;
}
.exp-group-title i {
    width: 34px; height: 34px; display: flex; align-items: center; justify-content: center;
    background: var(--color-accent-glow); color: var(--color-accent);
    border-radius: var(--radius-md); font-size: 0.88rem;
}

.timeline { position: relative; padding-left: 24px; }
.timeline::before {
    content: ''; position: absolute; left: 4px; top: 6px; bottom: 6px;
    width: 2px; background: var(--color-border);
}
.timeline-item { position: relative; padding-bottom: 34px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-dot {
    position: absolute; left: -24px; top: 3px;
    width: 10px; height: 10px; border-radius: 50%;
    background: var(--color-accent); border: 2px solid var(--color-bg);
    box-shadow: 0 0 0 2px var(--color-accent);
}
.timeline-content {
    padding: 20px; background: var(--color-surface);
    border: 1px solid var(--color-border); border-radius: var(--radius-lg);
    transition: all var(--transition-fast); box-shadow: var(--shadow-sm);
}
.timeline-content:hover { transform: translateX(5px); border-color: var(--color-accent); }
.timeline-content h3 { font-size: 1rem; margin-bottom: 3px; color: var(--color-text); }
.timeline-content .company { color: var(--color-accent); font-weight: 600; margin-bottom: 3px; font-size: 0.85rem; }
.timeline-content .date { color: var(--color-text-muted); font-size: 0.73rem; margin-bottom: 10px; }
.timeline-content p { color: var(--color-text-secondary); line-height: 1.65; margin-bottom: 10px; font-size: 0.88rem; }
.timeline-content ul { margin-left: 16px; color: var(--color-text-secondary); font-size: 0.85rem; }
.timeline-content li { margin-bottom: 5px; }

/* Experience summary card: text on the left, scrollable gallery on the right */
.exp-summary-card { cursor: pointer; display: block; }
.exp-summary-card:hover { transform: translateX(5px); border-color: var(--color-accent); box-shadow: var(--shadow-md); }
.exp-card-body {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 28px;
    align-items: stretch;
}
.exp-card-info { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.exp-summary-card h3 { margin-bottom: 0; }
.exp-summary-card .company { margin-bottom: 0; }
.exp-summary-card .date { margin-bottom: 8px; }
.exp-card-story {
    margin: 10px 0 4px;
    padding: 12px 14px;
    border-left: 3px solid var(--color-accent);
    background: var(--color-surface-1);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.exp-card-story h4 {
    font-size: 0.92rem;
    font-weight: 700;
    font-family: var(--font-primary);
    letter-spacing: 0;
    text-transform: none;
    color: var(--color-text);
    margin: 0 0 6px;
}
.exp-card-story h4 i { margin-right: 6px; }
.exp-card-story p { margin: 0; font-size: 0.9rem; line-height: 1.6; color: var(--color-text-soft); }
.exp-summary-card .exp-expand-btn { align-self: flex-start; margin-top: 12px; }
.exp-card-media { display: flex; align-items: center; min-width: 0; }
.exp-card-media .exp-gallery { margin-top: 0; width: 100%; height: 100%; }
.exp-card-media .exp-gallery-track { height: 100%; }
.exp-card-media .exp-gallery-slide { height: 300px; }
.exp-card-media .exp-gallery-slide img { cursor: zoom-in; }

/* Experience detail modal gallery */
.exp-modal-gallery {
    position: relative; margin: 18px 0 22px;
    border-radius: var(--radius-md); overflow: hidden;
    border: 1px solid var(--color-border); background: var(--color-surface-2);
}
.exp-modal-gallery .exp-gallery-track { height: 380px; }
.exp-modal-slide { flex: 0 0 100%; height: 100%; }
.exp-modal-slide img { width: 100%; height: 100%; object-fit: contain; cursor: pointer; }
.exp-modal-gallery .exp-gallery-nav,
.exp-modal-gallery .exp-gallery-dots,
.exp-modal-gallery .exp-gallery-counter { display: flex; }

/* Experience gallery */
.exp-gallery {
    margin-top: 14px;
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
}
.exp-gallery-track {
    display: flex;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.exp-gallery-slide {
    min-width: 100%;
    height: 360px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface-2);
    overflow: hidden;
}
.exp-gallery-slide img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    display: block;
}
.exp-gallery-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: rgba(255,255,255,0.9);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    z-index: 1;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}
.exp-gallery-nav:hover { background: var(--color-accent); color: white; border-color: var(--color-accent); }
.exp-gallery-nav.prev { left: 8px; }
.exp-gallery-nav.next { right: 8px; }
.exp-gallery-dots {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 6px;
    z-index: 1;
}
.exp-gallery-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: rgba(255,255,255,0.6);
    border: none;
    cursor: pointer;
    padding: 0;
    transition: all var(--transition-fast);
}
.exp-gallery-dot.active { background: var(--color-accent); transform: scale(1.3); }
.exp-gallery-counter {
    position: absolute;
    top: 10px;
    right: 12px;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: rgba(255,255,255,0.85);
    background: rgba(15,23,42,0.6);
    padding: 2px 8px;
    border-radius: 50px;
    z-index: 1;
}

/* Story blocks inside experience timeline */
.timeline-content .story-blocks {
    display: flex;
    flex-direction: column;
    gap: 26px;
    margin-bottom: 14px;
}
/* Spacing between story subsections in the experience detail modal */
#experienceModalContent .story-blocks {
    display: flex;
    flex-direction: column;
    gap: 26px;
    margin-top: 18px;
}
#experienceModalContent .story-block h4 {
    font-size: 0.9rem; font-weight: 700; margin-bottom: 6px;
    color: var(--color-text); display: flex; align-items: center; gap: 7px;
}
#experienceModalContent .story-block h4 i { color: var(--color-accent); font-size: 0.8rem; }
#experienceModalContent .story-block p {
    color: var(--color-text-secondary); line-height: 1.7; margin-bottom: 0; font-size: 0.88rem;
}
.timeline-content .story-block h4 {
    font-size: 0.88rem;
    font-weight: 700;
    margin-bottom: 5px;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 7px;
}
.timeline-content .story-block h4 i {
    color: var(--color-accent);
    font-size: 0.8rem;
}
.timeline-content .story-block p {
    color: var(--color-text-secondary);
    line-height: 1.65;
    margin-bottom: 0;
    font-size: 0.85rem;
}

/* Highlight tags for experience entries */
.exp-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid var(--color-border);
}
.highlight-tag {
    padding: 4px 10px;
    background: var(--color-surface-2);
    border: 1px solid var(--color-border);
    border-radius: 50px;
    font-size: 0.72rem;
    color: var(--color-text-secondary);
    font-weight: 500;
}

/* Community involvement grid */
.community-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.community-card {
    padding: 22px; background: var(--color-surface);
    border: 1px solid var(--color-border); border-radius: var(--radius-lg);
    transition: all var(--transition-base); box-shadow: var(--shadow-sm);
    display: flex; flex-direction: column; gap: 0;
}
.community-card:hover { transform: translateY(-3px); border-color: var(--color-accent); box-shadow: var(--shadow-md); }
.community-card h3 { font-size: 0.95rem; margin-bottom: 3px; color: var(--color-text); }
.community-card .org { color: var(--color-accent); font-size: 0.76rem; margin-bottom: 10px; font-weight: 600; }
.community-card > p { color: var(--color-text-secondary); font-size: 0.82rem; line-height: 1.6; margin-bottom: 14px; }
.community-card .exp-highlights { margin-top: auto; padding-top: 12px; }

/* ===== Contact ===== */
.contact-layout {
    display: grid; grid-template-columns: 1fr 1fr; gap: 44px;
    max-width: var(--content-max); margin: 0 auto;
}
.contact-info h3 { font-size: 1.5rem; margin-bottom: 14px; color: var(--color-text); }
.contact-info > p { color: var(--color-text-secondary); line-height: 1.65; margin-bottom: 24px; font-size: 0.9rem; }
.contact-links { display: flex; flex-direction: column; gap: 10px; }
.contact-card {
    display: flex; align-items: center; gap: 14px;
    padding: 15px 18px; background: var(--color-surface);
    border: 1px solid var(--color-border); border-radius: var(--radius-lg);
    text-decoration: none; color: var(--color-text);
    transition: all var(--transition-fast); box-shadow: var(--shadow-sm);
}
.contact-card:hover { transform: translateX(5px); border-color: var(--color-accent); }
.contact-card i {
    width: 36px; height: 36px; border-radius: 50%;
    background: var(--color-accent-glow); color: var(--color-accent);
    display: flex; align-items: center; justify-content: center;
    font-size: 0.88rem; flex-shrink: 0;
}
.contact-card span { display: block; font-size: 0.73rem; color: var(--color-text-secondary); margin-bottom: 1px; }
.contact-card strong { font-weight: 600; font-size: 0.88rem; }
.contact-boxes {
    display: flex; flex-wrap: wrap; gap: 10px;
    margin-top: 24px;
}
.contact-boxes .contact-card {
    width: calc(50% - 5px);
    box-sizing: border-box;
}

.contact-form-container {
    padding: 30px; background: var(--color-surface);
    border: 1px solid var(--color-border); border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
}
.contact-form { display: flex; flex-direction: column; gap: 15px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-group label { font-size: 0.78rem; font-weight: 600; color: var(--color-text-secondary); }
.form-group input, .form-group textarea {
    padding: 10px 12px; background: var(--color-bg);
    border: 1px solid var(--color-border); border-radius: var(--radius-md);
    color: var(--color-text); font-family: var(--font-primary); font-size: 0.88rem;
    transition: all var(--transition-fast);
}
.form-group input:focus, .form-group textarea:focus {
    outline: none; border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-glow);
}
.form-note {
    font-size: 0.7rem; color: var(--color-text-muted);
    text-align: center; margin-top: 3px;
}

/* ===== Footer ===== */
.footer {
    padding: 44px 48px 24px;
    border-top: 1px solid var(--color-border);
    background: var(--color-surface);
}
.footer-content {
    max-width: var(--content-max); margin: 0 auto;
    display: flex; justify-content: space-between; align-items: center;
    gap: 28px; flex-wrap: wrap; margin-bottom: 32px;
}
.footer-brand { display: flex; flex-direction: column; gap: 3px; }
.footer-brand strong { font-size: 1rem; color: var(--color-text); }
.footer-brand p { font-size: 0.78rem; color: var(--color-text-secondary); }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }
.footer-links a { color: var(--color-text-secondary); text-decoration: none; font-size: 0.82rem; transition: color var(--transition-fast); }
.footer-links a:hover { color: var(--color-accent); }
.footer-social { display: flex; gap: 10px; }
.footer-social a {
    width: 34px; height: 34px; border-radius: 50%;
    background: var(--color-surface-2); border: 1px solid var(--color-border);
    display: flex; align-items: center; justify-content: center;
    color: var(--color-text-secondary); text-decoration: none;
    transition: all var(--transition-fast);
}
.footer-social a:hover { background: var(--color-accent); border-color: var(--color-accent); color: white; transform: translateY(-2px); }

.footer-bottom {
    max-width: var(--content-max); margin: 0 auto; text-align: center;
    padding-top: 20px; border-top: 1px solid var(--color-border);
    color: var(--color-text-muted); font-size: 0.78rem;
    position: relative;
}
.back-to-top {
    position: absolute; right: 0; top: 50%; transform: translateY(-50%);
    width: 30px; height: 30px; border-radius: 50%;
    background: var(--color-accent); color: white; border: none;
    cursor: pointer; font-size: 0.75rem;
    display: flex; align-items: center; justify-content: center;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}
.back-to-top:hover { background: #1d4ed8; transform: translateY(-50%) scale(1.1); }

.image-credits {
    max-width: var(--content-max); margin: 0 auto;
    text-align: center; padding-top: 14px;
    color: var(--color-text-muted); font-size: 0.7rem; line-height: 1.5;
}

/* ===== Admin ===== */
.admin { border-top: 1px solid var(--color-border); }
.admin-login { max-width: 420px; margin: 0 auto; }
.login-card {
    padding: 32px; background: var(--color-surface);
    border: 1px solid var(--color-border); border-radius: var(--radius-xl);
    text-align: center; box-shadow: var(--shadow-sm);
}
.login-card > i { font-size: 2.2rem; color: var(--color-accent); margin-bottom: 14px; }
.login-card h3 { margin-bottom: 8px; color: var(--color-text); font-size: 1.2rem; }
.login-card > p { color: var(--color-text-secondary); margin-bottom: 18px; font-size: 0.82rem; }

.admin-input {
    width: 100%; padding: 10px 12px;
    background: var(--color-bg); border: 1px solid var(--color-border);
    border-radius: var(--radius-md); color: var(--color-text);
    font-family: var(--font-primary); font-size: 0.88rem; margin-bottom: 12px;
}
.admin-input:focus { outline: none; border-color: var(--color-accent); box-shadow: 0 0 0 3px var(--color-accent-glow); }
.admin-hint { margin-top: 14px; font-size: 0.7rem; color: var(--color-text-muted); }
.admin-hint kbd { padding: 2px 5px; background: var(--color-surface-2); border-radius: 3px; font-family: var(--font-mono); border: 1px solid var(--color-border); }
.admin-dashboard.hidden { display: none; }

.admin-tabs { display: flex; gap: 8px; margin-bottom: 24px; flex-wrap: wrap; max-width: var(--content-max); margin-left: auto; margin-right: auto; }
.admin-tab {
    padding: 8px 16px; border-radius: 50px; border: 1px solid var(--color-border);
    background: var(--color-surface); color: var(--color-text-secondary);
    font-weight: 500; cursor: pointer; transition: all var(--transition-fast);
    font-size: 0.85rem;
}
.admin-tab:hover, .admin-tab.active { background: var(--color-accent); color: white; border-color: var(--color-accent); }

.admin-panels { position: relative; max-width: var(--content-max); margin: 0 auto; }
.admin-panel { display: none; }
.admin-panel.active { display: block; animation: fadeIn 0.4s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
.admin-panel h3 { margin-bottom: 16px; color: var(--color-text); font-size: 1.1rem; }
.admin-form { display: flex; flex-direction: column; gap: 12px; max-width: 640px; }
.admin-form label { font-weight: 600; font-size: 0.82rem; color: var(--color-text); margin-bottom: -3px; }
.help-text { font-size: 0.73rem; color: var(--color-text-muted); margin-top: -6px; }
.admin-file-input { padding: 10px; background: var(--color-bg); border: 1px dashed var(--color-border); border-radius: var(--radius-md); color: var(--color-text-secondary); cursor: pointer; font-size: 0.85rem; }
.admin-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 18px; }
.admin-list-item { display: flex; justify-content: space-between; align-items: center; padding: 12px 15px; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); }
.admin-list-item span { font-weight: 500; color: var(--color-text); font-size: 0.9rem; }
.admin-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hidden-input { display: none; }

/* ===== Lightbox ===== */
.lightbox {
    position: fixed; inset: 0; background: rgba(15, 23, 42, 0.97);
    z-index: 10000; display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
}
.lightbox.active { opacity: 1; visibility: visible; }
.lightbox-close, .lightbox-prev, .lightbox-next {
    position: absolute; background: rgba(255,255,255,0.12); border: none;
    color: white; width: 42px; height: 42px; border-radius: 50%;
    cursor: pointer; font-size: 1rem;
    transition: all var(--transition-fast); z-index: 2;
}
.lightbox-close:hover, .lightbox-prev:hover, .lightbox-next:hover { background: rgba(255,255,255,0.25); transform: scale(1.08); }
.lightbox-close { top: 20px; right: 20px; }
.lightbox-prev { left: 20px; top: 50%; transform: translateY(-50%); }
.lightbox-next { right: 20px; top: 50%; transform: translateY(-50%); }
.lightbox-content { max-width: 90vw; max-height: 90vh; display: flex; flex-direction: column; align-items: center; }
.lightbox-content img { max-width: 100%; max-height: 78vh; object-fit: contain; border-radius: var(--radius-md); }
.lightbox-caption { margin-top: 16px; color: rgba(255,255,255,0.9); text-align: center; max-width: 640px; padding: 0 20px; font-size: 0.88rem; line-height: 1.55; }
.lightbox-counter { position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%); color: rgba(255,255,255,0.6); font-family: var(--font-mono); font-size: 0.73rem; }

/* ===== Modal ===== */
.modal {
    position: fixed; inset: 0; z-index: 9998; display: flex;
    align-items: center; justify-content: center;
    opacity: 0; visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
    padding: 20px;
}
.modal.active { opacity: 1; visibility: visible; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(15, 23, 42, 0.7); backdrop-filter: blur(6px); }
.modal-container {
    position: relative; background: var(--color-surface);
    border: 1px solid var(--color-border); border-radius: var(--radius-xl);
    max-width: 760px; width: 100%; max-height: 90vh;
    overflow-y: auto; z-index: 1;
    transform: scale(0.96);
    transition: transform var(--transition-base);
    box-shadow: var(--shadow-lg);
}
.modal.active .modal-container { transform: scale(1); }
.modal-close {
    position: absolute; top: 16px; right: 16px;
    width: 32px; height: 32px; border-radius: 50%;
    background: var(--color-surface-2); border: 1px solid var(--color-border);
    color: var(--color-text); cursor: pointer; z-index: 2;
    transition: all var(--transition-fast);
}
.modal-close:hover { background: var(--color-accent); color: white; border-color: var(--color-accent); }
.modal-content { padding: 36px; }
.modal-content h2 { font-size: 1.4rem; margin-bottom: 6px; color: var(--color-text); }
.modal-content .modal-meta { color: var(--color-text-secondary); margin-bottom: 18px; font-size: 0.85rem; }
.modal-gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin: 20px 0; }
.modal-gallery img { width: 100%; border-radius: var(--radius-md); cursor: pointer; transition: transform var(--transition-fast); aspect-ratio: 4/3; object-fit: cover; }
.modal-gallery img:hover { transform: scale(1.01); }
.modal-description { color: var(--color-text-secondary); line-height: 1.7; margin-bottom: 18px; font-size: 0.9rem; }
.modal-description h4 { color: var(--color-text); margin: 22px 0 8px; font-size: 0.95rem; display: flex; align-items: center; gap: 8px; }
.modal-description h4 i { color: var(--color-accent); font-size: 0.85rem; }
.modal-description h4:first-child { margin-top: 0; }
.modal-description p { margin-bottom: 4px; }
.modal-description ul { margin-left: 18px; }
.modal-description li { margin-bottom: 5px; }

/* ===== Toast ===== */
.toast {
    position: fixed; bottom: 24px; right: 24px;
    padding: 12px 18px; background: var(--color-surface);
    border: 1px solid var(--color-border); border-radius: var(--radius-md);
    color: var(--color-text); font-weight: 500; font-size: 0.85rem;
    box-shadow: var(--shadow-lg); z-index: 10001;
    transform: translateY(120%);
    transition: transform var(--transition-base);
}
.toast.show { transform: translateY(0); }

/* ===== Fade-in Animations ===== */
.fade-in {
    opacity: 0;
    transform: translateY(20px) scale(0.97);
    transition: opacity 0.55s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.55s cubic-bezier(0.16, 1, 0.3, 1);
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0) scale(1);
}

/* Card pop on hover */
.project-card, .journey-card, .community-card, .contact-card {
    transition: all var(--transition-base);
}

.hidden { display: none !important; }

/* ===== Responsive ===== */
@media (max-width: 992px) {
    .nav-links { display: none; }
    .mobile-menu-btn { display: flex; }
    .featured-card { grid-template-columns: 1fr; }
    .journey-layout { grid-template-columns: 1fr; }
    .journey-sidebar { display: grid; grid-template-columns: repeat(3, 1fr); }
    .journey-image-card img { height: 110px; }
    .journey-image-card.portrait img { height: 300px; }
    .about-layout { grid-template-columns: 1fr; }
    .about-bio { position: relative; top: 0; }
    .projects-grid { grid-template-columns: 1fr; }
    .contact-layout { grid-template-columns: 1fr; }
    .volunteer-grid, .honors-grid, .community-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .section { padding: 60px 24px; }
    .nav-container { padding: 0 24px; }
    .hero { padding: 100px 24px 60px; min-height: auto; }
    .hero-title { font-size: 2.4rem; }
    .hero-intro { text-align: left; }
    .hero-stats { gap: 0; flex-direction: column; max-width: 100%; padding: 8px 16px; }
    .stat-item { text-align: center; padding: 12px 0; border-right: none; border-bottom: 1px solid var(--color-border); }
    .stat-item:last-child { border-bottom: none; }
    .stat-item strong { font-size: 1.3rem; }
    .hero-cta { flex-direction: column; align-items: stretch; }
    .hero-cta .btn { width: 100%; }
    .featured-project { padding: 60px 24px; }
    .featured-metrics { grid-template-columns: repeat(2, 1fr); gap: 0; padding: 10px; }
    .metric { border-right: none; padding: 12px 8px; }
    .metric:nth-child(odd) { border-right: 1px solid var(--color-border); }
    .metric:nth-child(-n+2) { border-bottom: 1px solid var(--color-border); }
    .featured-thumbs { grid-template-columns: repeat(3, 1fr); }
    .featured-actions { flex-direction: column; }
    .featured-actions .btn { width: 100%; }
    .journey-timeline { padding-left: 28px; }
    .journey-marker { left: -28px; width: 24px; height: 24px; font-size: 0.65rem; }
    .journey-timeline::before { left: 11px; }
    .journey-sidebar { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .community-grid { grid-template-columns: 1fr; }
    .exp-card-body { grid-template-columns: 1fr; gap: 18px; }
    .exp-card-media .exp-gallery-slide { height: 240px; }
    .exp-gallery-slide { height: 280px; }
    .modal-gallery { grid-template-columns: 1fr; }
    .modal-content { padding: 24px; }
    .footer-content { flex-direction: column; text-align: center; }
    .admin-actions { flex-direction: column; }
    .back-to-top { position: static; margin: 14px auto 0; transform: none; }
    .back-to-top:hover { transform: scale(1.1) !important; }
}

@media (max-width: 480px) {
    .section { padding: 48px 16px; }
    .hero { padding: 90px 16px 48px; }
    .hero-title { font-size: 2rem; }
    .hero-stats { gap: 16px; flex-direction: column; }
    .section-title { font-size: 1.5rem; }
    .featured-project { padding: 48px 16px; }
    .featured-metrics { grid-template-columns: 1fr 1fr; }
    .featured-thumbs { grid-template-columns: repeat(2, 1fr); }
    .journey-card { padding: 18px; }
}

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

/* ===== Dark Theme Overrides (interactive overlays) ===== */
[data-theme="dark"] .navbar.scrolled { background: var(--color-bg); }
[data-theme="dark"] .image-expand {
    background: var(--color-surface-2);
    color: var(--color-text);
    box-shadow: var(--shadow-sm);
}
[data-theme="dark"] .exp-gallery-nav {
    background: var(--color-surface-2);
    color: var(--color-text);
}
[data-theme="dark"] .exp-gallery-dot { background: var(--color-surface-3); }
[data-theme="dark"] .exp-gallery-dot.active { background: var(--color-accent); }
[data-theme="dark"] .lightbox { background: rgba(10, 14, 18, 0.94); }
[data-theme="dark"] .lightbox .lightbox-caption { color: rgba(231, 235, 242, 0.92); }
[data-theme="dark"] .lightbox .lightbox-counter { color: rgba(231, 235, 242, 0.6); }

/* Smooth transition when toggling themes */
body { transition: background var(--transition-base), color var(--transition-base); }