/* ============================================
   RODRIGO SÁNCHEZ — Portfolio CSS
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,wght@0,300;0,400;0,700;0,900;1,300;1,700&family=Inter:wght@400;500;600;700;800&display=swap');

:root {
    --color-bg: #ffffff;
    --color-text: #0d0d0d;
    --color-text-secondary: #555555;
    --color-accent: #16a34a;
    --color-accent-light: #dcfce7;
    --color-border: #e0e0e0;
    --color-hover: #f7f7f7;
    --color-dark: #0d1a0d;
    --color-forest: #1a2c1a;
    --color-forest-mid: #243824;
    --color-badge-done: #dcfce7;
    --color-badge-done-text: #15803d;
    --color-badge-wip: #fef3c7;
    --color-badge-wip-text: #b45309;

    --font-display: 'Fraunces', Georgia, serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 5rem;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 16px 40px rgba(0,0,0,0.14);

    --radius-sm: 0.375rem;
    --radius-md: 0.75rem;
    --radius-lg: 1.25rem;
    --radius-xl: 1.75rem;

    --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Reset ─────────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; transition: var(--transition); }
img { display: block; max-width: 100%; }

/* ── Layout ─────────────────────────────────── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 var(--spacing-lg); }

/* ── Navigation ─────────────────────────────── */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    transition: var(--transition);
    padding: 0;
}

.navbar.hero-nav {
    background: transparent;
}

.navbar.scrolled {
    background: rgba(13, 26, 13, 0.96);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.navbar.light-nav {
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
}

.navbar.light-nav.scrolled {
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 68px;
}

.nav-logo a {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    color: white;
    letter-spacing: -0.01em;
}

.light-nav .nav-logo a { color: var(--color-text); }

.nav-menu { display: flex; align-items: center; }

.nav-list {
    display: flex;
    gap: var(--spacing-2xl);
    list-style: none;
}

.nav-list a {
    font-size: 0.875rem;
    font-weight: 500;
    color: rgba(255,255,255,0.85);
    letter-spacing: 0.02em;
}

.light-nav .nav-list a { color: var(--color-text); }

.nav-list a:hover { color: white; opacity: 1; }
.light-nav .nav-list a:hover { color: var(--color-accent); }

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}
.hamburger span {
    width: 24px;
    height: 2px;
    background: white;
    border-radius: 2px;
    transition: var(--transition);
    display: block;
}
.light-nav .hamburger span { background: var(--color-text); }
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ── Hero Section ────────────────────────────── */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--color-dark);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-image: url('https://images.squarespace-cdn.com/content/v1/676239f43af44467d9b590b9/ac38f839-066c-4d52-83f8-9aa0767206df/DSC02828.JPG');
    background-size: cover;
    background-position: center 30%;
    opacity: 0.45;
    z-index: 0;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        rgba(13, 26, 13, 0.55) 0%,
        rgba(13, 26, 13, 0.2) 50%,
        rgba(13, 26, 13, 0.85) 100%
    );
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-lg);
    padding-top: 120px;
    max-width: 900px;
}

.hero-eyebrow {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    background: rgba(22,163,74,0.15);
    border: 1px solid rgba(22,163,74,0.3);
    padding: 0.4rem 1rem;
    border-radius: 100px;
    margin-bottom: var(--spacing-xl);
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3.5rem, 9vw, 8rem);
    font-weight: 900;
    line-height: 0.95;
    color: white;
    letter-spacing: -0.03em;
    margin-bottom: var(--spacing-xl);
}

.hero-title em {
    font-style: italic;
    color: #86efac;
}

.hero-tagline {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: rgba(255,255,255,0.75);
    max-width: 540px;
    margin: 0 auto var(--spacing-xl);
    line-height: 1.7;
    font-weight: 400;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ── Marquee ─────────────────────────────────── */
.marquee-section {
    background: var(--color-accent);
    overflow: hidden;
    padding: 0;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.marquee-track {
    display: flex;
    white-space: nowrap;
    animation: marquee 22s linear infinite;
}

.marquee-track:hover { animation-play-state: paused; }

.marquee-content {
    display: flex;
    align-items: center;
    gap: 0;
    flex-shrink: 0;
}

.marquee-item {
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: white;
    padding: 0.9rem 2.5rem;
    white-space: nowrap;
}

.marquee-dot {
    color: rgba(255,255,255,0.5);
    font-size: 0.5rem;
    padding: 0 0.5rem 0 0;
}

@keyframes marquee {
    0%   { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* ── Buttons ─────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.75rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9rem;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    font-family: var(--font-body);
}

.btn-primary {
    background: var(--color-accent);
    color: white;
    box-shadow: 0 4px 14px rgba(22,163,74,0.35);
}
.btn-primary:hover {
    background: #15803d;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(22,163,74,0.4);
    color: white;
}

.btn-ghost {
    background: rgba(255,255,255,0.12);
    color: white;
    border: 1px solid rgba(255,255,255,0.25);
    backdrop-filter: blur(8px);
}
.btn-ghost:hover {
    background: rgba(255,255,255,0.2);
    color: white;
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--color-text);
    border: 2px solid var(--color-text);
}
.btn-outline:hover {
    background: var(--color-text);
    color: white;
    transform: translateY(-2px);
}

/* ── Category Section (homepage) ────────────── */
.categories-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg);
}

.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 900;
    line-height: 1.05;
    letter-spacing: -0.03em;
    margin-bottom: var(--spacing-lg);
}

.section-sub {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    max-width: 520px;
    line-height: 1.7;
    margin-bottom: var(--spacing-3xl);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.category-card {
    display: block;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    background: white;
    color: var(--color-text);
}

.category-card::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: var(--transition);
    border-radius: inherit;
}

.category-card.mobile::before  { background: linear-gradient(135deg, rgba(59,130,246,0.06), transparent); }
.category-card.web::before     { background: linear-gradient(135deg, rgba(168,85,247,0.06), transparent); }
.category-card.research::before{ background: linear-gradient(135deg, rgba(249,115,22,0.06), transparent); }
.category-card.tools::before   { background: linear-gradient(135deg, rgba(20,184,166,0.06), transparent); }

.category-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}
.category-card:hover::before { opacity: 1; }

.category-emoji {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
    display: block;
}

.category-title {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.category-count {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-accent);
    background: var(--color-accent-light);
    padding: 0.2rem 0.6rem;
    border-radius: 100px;
    display: inline-block;
    margin-bottom: var(--spacing-md);
}

.category-desc {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.65;
    margin-bottom: var(--spacing-lg);
}

.category-arrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-accent);
    transition: var(--transition);
}
.category-card:hover .category-arrow { gap: 0.75rem; }

/* ── About Section (dark) ─────────────────── */
.about-dark {
    background: var(--color-forest);
    padding: var(--spacing-3xl) 0;
    color: white;
}

.about-dark-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.about-dark-text .section-label { color: #86efac; }

.about-dark-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 900;
    line-height: 1.0;
    letter-spacing: -0.03em;
    color: white;
    margin-bottom: var(--spacing-2xl);
}

.about-dark-title em {
    font-style: italic;
    color: #86efac;
}

.about-bio p {
    color: rgba(255,255,255,0.72);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

.about-bio p strong { color: white; font-weight: 700; }

.pills-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: var(--spacing-lg);
}

.pill-dark {
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    color: rgba(255,255,255,0.85);
    padding: 0.4rem 0.9rem;
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    transition: var(--transition);
}
.pill-dark:hover {
    background: rgba(22,163,74,0.25);
    border-color: rgba(22,163,74,0.4);
    color: #86efac;
}

/* About dark — two-photo column */
.about-dark-photos {
    display: grid;
    grid-template-rows: 1fr auto;
    gap: var(--spacing-md);
}

.about-photo-main {
    width: 100%;
    border-radius: var(--radius-xl);
    box-shadow: 0 24px 60px rgba(0,0,0,0.4);
    object-fit: cover;
    aspect-ratio: 4/5;
}

.about-photo-secondary {
    width: 100%;
    border-radius: var(--radius-xl);
    box-shadow: 0 16px 40px rgba(0,0,0,0.35);
    object-fit: cover;
    aspect-ratio: 16/9;
    object-position: center 40%;
}

.about-stat-bar {
    margin-top: var(--spacing-2xl);
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

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

.about-stat-num {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 900;
    color: white;
    line-height: 1;
    display: block;
}

.about-stat-label {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.5);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-top: 0.25rem;
    display: block;
}

/* ── Contact Section ─────────────────────── */
.contact {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.contact-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-xl);
    background: white;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    color: var(--color-text);
}

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

.contact-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--color-accent-light);
    border-radius: var(--radius-md);
    color: var(--color-accent);
    font-size: 1.4rem;
    flex-shrink: 0;
}

.contact-info h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 0.2rem; }
.contact-info p { color: var(--color-text-secondary); font-size: 0.8rem; }

.contact-arrow {
    color: var(--color-accent);
    margin-left: auto;
    opacity: 0;
    transform: translateX(-6px);
    transition: var(--transition);
}
.contact-card:hover .contact-arrow { opacity: 1; transform: translateX(0); }

/* ── Footer ──────────────────────────────── */
.footer {
    background: var(--color-dark);
    padding: var(--spacing-xl) 0;
    color: rgba(255,255,255,0.5);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.footer-content p { font-size: 0.85rem; }

.footer-socials {
    display: flex;
    gap: var(--spacing-lg);
    font-size: 1.1rem;
}

.footer-socials a {
    color: rgba(255,255,255,0.45);
    transition: var(--transition);
}
.footer-socials a:hover { color: #86efac; }

/* ── Page Header (sub-pages) ─────────────── */
.page-hero {
    background: var(--color-dark);
    padding: 120px 0 var(--spacing-3xl);
    color: white;
    position: relative;
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    top: -40%;
    right: -10%;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    opacity: 0.06;
    z-index: 0;
}

.page-hero.mobile-hero::before  { background: #3b82f6; }
.page-hero.web-hero::before     { background: #a855f7; }
.page-hero.research-hero::before{ background: #f97316; }
.page-hero.tools-hero::before   { background: #14b8a6; }

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

.page-hero-back {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: rgba(255,255,255,0.55);
    margin-bottom: var(--spacing-2xl);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    transition: var(--transition);
}
.page-hero-back:hover { color: white; }

.page-hero-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 900;
    line-height: 0.95;
    letter-spacing: -0.04em;
    color: white;
    margin-bottom: var(--spacing-lg);
}

.page-hero-title em {
    font-style: italic;
    display: block;
}

.page-hero.mobile-hero  .page-hero-title em { color: #93c5fd; }
.page-hero.web-hero     .page-hero-title em { color: #d8b4fe; }
.page-hero.research-hero .page-hero-title em{ color: #fdba74; }
.page-hero.tools-hero   .page-hero-title em { color: #5eead4; }

.page-hero-desc {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.65);
    max-width: 520px;
    line-height: 1.7;
}

/* ── Full-width Project Cards (sub-pages) ── */
.projects-list {
    padding: var(--spacing-3xl) 0;
}

.project-feature {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    padding: var(--spacing-3xl) 0;
    border-bottom: 1px solid var(--color-border);
}

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

.project-feature.flip { direction: rtl; }
.project-feature.flip > * { direction: ltr; }

.project-visual {
    border-radius: var(--radius-xl);
    overflow: hidden;
    aspect-ratio: 16/10;
    position: relative;
    flex-shrink: 0;
}

.project-visual-inner {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    position: relative;
}

/* Category color gradients for project visuals */
.project-feature[data-cat="mobile"]   .project-visual-inner { background: linear-gradient(135deg, #1e3a5f, #2563eb); }
.project-feature[data-cat="web"]      .project-visual-inner { background: linear-gradient(135deg, #3b1a5a, #9333ea); }
.project-feature[data-cat="research"] .project-visual-inner { background: linear-gradient(135deg, #5a2800, #ea580c); }
.project-feature[data-cat="tools"]    .project-visual-inner { background: linear-gradient(135deg, #0d3b38, #0d9488); }

.project-visual-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    inset: 0;
}

.project-visual-img.padded-img {
    inset: 20px;
    width: calc(100% - 40px);
    height: calc(100% - 40px);
    border-radius: calc(var(--radius-xl) - 12px);
}

.project-info { padding: var(--spacing-lg) 0; }

.project-badges {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.3rem 0.75rem;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.badge-done {
    background: var(--color-badge-done);
    color: var(--color-badge-done-text);
}

.badge-wip {
    background: var(--color-badge-wip);
    color: var(--color-badge-wip-text);
}

.badge-category {
    background: #f3f3f3;
    color: var(--color-text);
}

.project-number {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    margin-bottom: var(--spacing-md);
}

.project-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 3rem);
    font-weight: 900;
    letter-spacing: -0.03em;
    line-height: 1.05;
    margin-bottom: var(--spacing-lg);
}

.project-desc {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.75;
    margin-bottom: var(--spacing-lg);
}

.project-tags {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
}

.tag {
    display: inline-block;
    background: #f0f0f0;
    color: var(--color-text);
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.78rem;
    font-weight: 600;
}

.project-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.btn-action {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.6rem 1.1rem;
    border: 1.5px solid var(--color-border);
    background: transparent;
    color: var(--color-text);
    border-radius: var(--radius-md);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-action:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background: rgba(22,163,74,0.05);
}

.btn-action.primary-action {
    background: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
}
.btn-action.primary-action:hover {
    background: #15803d;
    color: white;
    border-color: #15803d;
}

.disabled-action,
.disabled-action:hover {
    cursor: not-allowed;
    opacity: 0.72;
    pointer-events: none;
    filter: grayscale(0.15);
}

.unavailable-visual {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    background: linear-gradient(135deg, rgba(255,255,255,0.16), rgba(255,255,255,0.04));
    color: rgba(255,255,255,0.88);
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

.unavailable-visual i {
    font-size: 2rem;
}

/* ── All-projects grid (compact, for homepage) ──*/
.projects-compact {
    padding: var(--spacing-3xl) 0;
    background: #fafafa;
}

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

.project-card {
    background: white;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

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

.project-card.hidden { display: none; }

.card-visual {
    aspect-ratio: 16/9;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    position: relative;
    overflow: hidden;
}

.card-body { padding: var(--spacing-xl); flex: 1; display: flex; flex-direction: column; }

.card-badges {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
}

.card-body h3 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-sm);
}

.card-description {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    line-height: 1.65;
    flex: 1;
    margin-bottom: var(--spacing-lg);
}

.card-tags {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.card-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

/* ── Filter Tabs ─────────────────────────── */
.filter-tabs {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.5rem 1.25rem;
    border: 1.5px solid var(--color-border);
    background: transparent;
    color: var(--color-text);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-body);
}

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

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

/* ── Responsive ──────────────────────────── */
@media (max-width: 900px) {
    .categories-grid { grid-template-columns: 1fr; }
    .about-dark-inner { grid-template-columns: 1fr; }
    .about-dark-photos { order: -1; grid-template-rows: auto auto; }
    .about-photo-main { aspect-ratio: 3/2; }
    .about-photo-secondary { aspect-ratio: 16/7; }
    .about-stat-bar { grid-template-columns: repeat(3, 1fr); }
    .project-feature { grid-template-columns: 1fr; }
    .project-feature.flip { direction: ltr; }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 68px;
        left: 0; right: 0;
        background: var(--color-dark);
        flex-direction: column;
        padding: var(--spacing-lg);
        border-bottom: 1px solid rgba(255,255,255,0.08);
    }

    .light-nav .nav-menu {
        background: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
    }

    .nav-menu.active { display: flex; }
    .nav-list { flex-direction: column; gap: var(--spacing-lg); }
    .hamburger { display: flex; }

    .hero-title { font-size: 3rem; }
    .hero-buttons { flex-direction: column; align-items: center; }
    .btn { width: 100%; max-width: 300px; justify-content: center; }
    .categories-grid { grid-template-columns: 1fr; gap: var(--spacing-lg); }
    .projects-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-content { flex-direction: column; text-align: center; }
    .project-feature { gap: var(--spacing-2xl); }
}

@media (max-width: 480px) {
    .container { padding: 0 var(--spacing-md); }
    .hero-title { font-size: 2.5rem; }
    .page-hero-title { font-size: 2.5rem; }
    .section-title { font-size: 2rem; }
    .about-dark-title { font-size: 2.5rem; }
    .project-title { font-size: 2rem; }
    .about-stat-bar { grid-template-columns: repeat(3, 1fr); gap: var(--spacing-md); }
    .about-stat-num { font-size: 2rem; }
}

/* ── Timeline ────────────────────────────── */
.timeline-section {
    background: var(--color-forest-mid);
    padding: var(--spacing-2xl) var(--spacing-lg);
    width: 100%;
}

.timeline-label {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.4);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

/* On desktop: scroll wrapper is just a flex container — no overflow scroll */
.timeline-scroll {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}
.timeline-scroll::-webkit-scrollbar { display: none; }

.timeline-track {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 1rem var(--spacing-lg) 0.5rem;
    gap: 0;
}

.timeline-stop {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
    min-width: 52px;
    max-width: 90px;
    cursor: default;
    position: relative;
}

/* Tooltip on hover */
.timeline-stop::after {
    content: attr(data-city);
    position: absolute;
    bottom: calc(100% + 18px);
    left: 50%;
    transform: translateX(-50%) translateY(6px);
    background: rgba(13,26,13,0.95);
    color: #86efac;
    font-size: 0.7rem;
    font-weight: 700;
    white-space: nowrap;
    padding: 0.3rem 0.65rem;
    border-radius: 6px;
    border: 1px solid rgba(134,239,172,0.2);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.18s ease, transform 0.18s ease;
    letter-spacing: 0.04em;
}

.timeline-stop:hover::after {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.timeline-flag {
    font-size: 1.6rem;
    line-height: 1;
    display: block;
    transition: transform 0.28s cubic-bezier(0.34, 1.56, 0.64, 1),
                filter 0.28s ease;
    will-change: transform;
}

.timeline-stop:hover .timeline-flag {
    transform: scale(1.9) translateY(-6px);
    filter: drop-shadow(0 8px 14px rgba(0,0,0,0.55));
}

.timeline-stop.current .timeline-flag {
    filter: drop-shadow(0 0 10px rgba(134,239,172,0.7));
}

.timeline-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: rgba(255,255,255,0.18);
    border: 2px solid rgba(255,255,255,0.1);
    transition: background 0.2s, border-color 0.2s, box-shadow 0.2s, transform 0.2s;
    flex-shrink: 0;
}

.timeline-stop:hover .timeline-dot {
    background: white;
    border-color: rgba(255,255,255,0.5);
    transform: scale(1.35);
}

.timeline-stop.current .timeline-dot {
    background: var(--color-accent);
    border-color: #86efac;
    box-shadow: 0 0 0 5px rgba(22,163,74,0.18);
}

/* City label — always visible */
.timeline-city {
    font-size: 0.6rem;
    font-weight: 600;
    color: rgba(255,255,255,0.45);
    white-space: nowrap;
    transition: color 0.2s ease;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    line-height: 1;
}

.timeline-stop:hover .timeline-city {
    color: rgba(255,255,255,0.9);
}

.timeline-stop.current .timeline-city {
    color: #86efac;
    font-weight: 700;
}

/* The line between stops */
.timeline-arrow {
    flex: 1;
    min-width: 8px;
    height: 1px;
    background: linear-gradient(to right, rgba(255,255,255,0.06), rgba(255,255,255,0.18), rgba(255,255,255,0.06));
    flex-shrink: 1;
    position: relative;
    top: -14px;
    align-self: flex-start;
    margin-top: 28px;
}

/* ── Spotlight (featured project on category pages) ── */
.spotlight {
    padding: var(--spacing-3xl) 0;
}

.spotlight.mobile-page   { background: linear-gradient(160deg, #0e1f40 0%, #0d1a0d 100%); }
.spotlight.web-page      { background: linear-gradient(160deg, #1e0a38 0%, #0d1a0d 100%); }
.spotlight.research-page { background: linear-gradient(160deg, #3a1000 0%, #0d1a0d 100%); }
.spotlight.tools-page    { background: linear-gradient(160deg, #04302d 0%, #0d1a0d 100%); }

.spotlight-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.spotlight-label {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.45);
    margin-bottom: var(--spacing-lg);
}

.spotlight-title {
    font-family: var(--font-display);
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    font-weight: 900;
    line-height: 1.0;
    letter-spacing: -0.03em;
    color: white;
    margin-bottom: var(--spacing-lg);
}

.spotlight-title em {
    font-style: italic;
    display: block;
    color: #86efac;
}

.spotlight-desc {
    font-size: 1rem;
    color: rgba(255,255,255,0.65);
    line-height: 1.75;
    margin-bottom: var(--spacing-lg);
    max-width: 480px;
}

.spotlight-visual {
    border-radius: var(--radius-xl);
    overflow: hidden;
    aspect-ratio: 4/3;
}

.spotlight-visual-inner {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-xl);
    position: relative;
}

.spotlight-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    inset: 0;
    border-radius: var(--radius-xl);
}

@media (max-width: 768px) {
    .spotlight-inner { grid-template-columns: 1fr; }
    .spotlight-visual { order: -1; aspect-ratio: 16/9; }
}

/* About photo placeholder */
.about-photo-placeholder {
    width: 100%;
}

/* ── Contact photo ────────────────────────── */
.contact-with-photo {
    display: grid;
    grid-template-columns: 1fr 420px;
    gap: var(--spacing-3xl);
    align-items: start;
}

.contact-photo-wrap {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    aspect-ratio: 3/4;
}

.contact-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
}

.contact-photo-caption {
    position: absolute;
    bottom: 0;
    left: 0; right: 0;
    background: linear-gradient(to top, rgba(13,26,13,0.9) 0%, transparent 100%);
    padding: var(--spacing-lg);
}

.contact-photo-caption p {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.65);
    font-style: italic;
}

@media (max-width: 900px) {
    .contact-with-photo { grid-template-columns: 1fr; }
    .contact-photo-wrap { aspect-ratio: 16/9; }
    .contact-photo { object-position: center 30%; }
}

/* ── About Gallery ───────────────────────── */
.about-gallery {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
    gap: var(--spacing-md);
}

.about-gallery-img {
    width: 100%;
    border-radius: var(--radius-lg);
    object-fit: cover;
    box-shadow: 0 16px 40px rgba(0,0,0,0.35);
}

.about-gallery-img:first-child {
    grid-row: 1 / 3;
    aspect-ratio: 3/4;
}

.about-gallery-img:nth-child(2),
.about-gallery-img:nth-child(3) {
    aspect-ratio: 4/3;
}

/* Placeholder for missing images */
.img-placeholder {
    background: rgba(255,255,255,0.05);
    border: 2px dashed rgba(255,255,255,0.15);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    color: rgba(255,255,255,0.3);
    text-align: center;
    padding: var(--spacing-lg);
}

/* ── Spotlight / Featured Project ────────── */
.spotlight {
    background: var(--color-dark);
    padding: var(--spacing-2xl) 0 var(--spacing-3xl);
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.spotlight-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.spotlight-label {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    background: rgba(22,163,74,0.12);
    border: 1px solid rgba(22,163,74,0.25);
    padding: 0.35rem 0.9rem;
    border-radius: 100px;
    margin-bottom: var(--spacing-lg);
}

.spotlight-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 900;
    letter-spacing: -0.04em;
    line-height: 0.95;
    color: white;
    margin-bottom: var(--spacing-xl);
}

.spotlight-title em {
    font-style: italic;
    display: block;
}

.mobile-hero   .spotlight-title em { color: #93c5fd; }
.web-hero      .spotlight-title em,
.web-page      .spotlight-title em { color: #d8b4fe; }
.research-hero .spotlight-title em,
.research-page .spotlight-title em { color: #fdba74; }
.tools-hero    .spotlight-title em,
.tools-page    .spotlight-title em { color: #5eead4; }

.spotlight-desc {
    font-size: 1.05rem;
    color: rgba(255,255,255,0.68);
    line-height: 1.75;
    margin-bottom: var(--spacing-xl);
    max-width: 500px;
}

.spotlight-visual {
    border-radius: var(--radius-xl);
    overflow: hidden;
    aspect-ratio: 16/10;
    position: relative;
}

.spotlight-visual-inner {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
}

.spotlight-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* category colour gradients for spotlight */
.mobile-page   .spotlight-visual-inner { background: linear-gradient(135deg, #0f2447, #1d4ed8); }
.web-page      .spotlight-visual-inner { background: linear-gradient(135deg, #2e1050, #7c3aed); }
.research-page .spotlight-visual-inner { background: linear-gradient(135deg, #431407, #c2410c); }
.tools-page    .spotlight-visual-inner { background: linear-gradient(135deg, #042f2e, #0f766e); }

@media (max-width: 768px) {
    .spotlight-inner { grid-template-columns: 1fr; }
    .spotlight-title { font-size: 2.5rem; }
}