/* ============================================================
   Zilin Ma — Personal Academic Site
   Design system: engineering field-notebook — grid paper, ink, blue/teal/coral
   ============================================================ */

:root {
    /* Core palette */
    --bg-color: #f4f8fa;
    --bg-elevated: #ffffff;
    --bg-card: #ffffff;
    --border-subtle: rgba(16, 43, 58, 0.16);
    --border-strong: rgba(16, 43, 58, 0.30);

    --text-primary: #102b3a;
    --text-secondary: #4d6876;
    --text-tertiary: #6d8896;

    --accent-primary: #087ea4;   /* engineering blue */
    --accent-secondary: #0f8f83; /* teal */
    --accent-tertiary: #d85d3f;  /* coral */
    --accent-glow: rgba(8, 126, 164, 0.20);

    --gradient-accent: linear-gradient(120deg, #087ea4 0%, #0f8f83 55%, #d85d3f 100%);
    --gradient-warm: linear-gradient(120deg, #d85d3f, #e8935c);

    /* Type */
    --font-heading: 'Fraunces', Georgia, serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', monospace;

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;

    --container: 1120px;
    --transition: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    background-color: var(--bg-color);
    background-image:
        linear-gradient(rgba(16, 43, 58, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(16, 43, 58, 0.035) 1px, transparent 1px),
        radial-gradient(circle at 88% 8%, rgba(216, 93, 63, 0.10), transparent 28rem);
    background-size: 28px 28px, 28px 28px, auto;
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 16.5px;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

::selection { background: var(--accent-primary); color: #ffffff; }

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

a { color: var(--accent-secondary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--text-primary); }

ul, ol { padding-left: 1.3em; }
nav ul { list-style: none; padding: 0; }

.container {
    width: min(var(--container), calc(100% - 48px));
    margin-inline: auto;
}

/* ---------- Background layers ---------- */
#fun-canvas {
    display: none;
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.aurora {
    display: none;
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}
.aurora::before, .aurora::after {
    content: "";
    position: absolute;
    width: 60vmax;
    height: 60vmax;
    border-radius: 50%;
    filter: blur(90px);
    opacity: 0.5;
    will-change: transform;
}
.aurora::before {
    background: radial-gradient(circle at center, #ffb45c, transparent 65%);
    top: -25vmax;
    left: -15vmax;
    animation: drift-a 26s ease-in-out infinite alternate;
}
.aurora::after {
    background: radial-gradient(circle at center, #2dd4bf, transparent 65%);
    bottom: -28vmax;
    right: -18vmax;
    animation: drift-b 32s ease-in-out infinite alternate;
}
@keyframes drift-a {
    from { transform: translate(0, 0) scale(1); }
    to   { transform: translate(12vmax, 8vmax) scale(1.15); }
}
@keyframes drift-b {
    from { transform: translate(0, 0) scale(1.1); }
    to   { transform: translate(-10vmax, -7vmax) scale(0.95); }
}

/* Subtle grain so gradients don't band */
body::after {
    content: none;
    position: fixed;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    opacity: 0.025;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

main, header, section, footer { position: relative; z-index: 2; }

/* ---------- Header / Nav ---------- */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 18px 0;
    transition: padding var(--transition), background var(--transition),
                border-color var(--transition);
    border-bottom: 1px solid transparent;
}
header.scrolled {
    padding: 10px 0;
    background: rgba(244, 248, 250, 0.94);
    backdrop-filter: blur(18px) saturate(1.4);
    -webkit-backdrop-filter: blur(18px) saturate(1.4);
    border-bottom-color: var(--border-subtle);
}
header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.35rem;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}
.logo .dot {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.nav-menu ul {
    display: flex;
    gap: 6px;
}
.nav-menu a {
    display: inline-block;
    padding: 8px 14px;
    border-radius: 999px;
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition), background var(--transition);
}
.nav-menu a:hover { color: var(--text-primary); background: rgba(8, 126, 164, 0.08); }
.nav-menu a.active {
    color: #ffffff;
    background: var(--text-primary);
    box-shadow: none;
}

/* Mobile menu toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
    z-index: 110;
}
.menu-toggle .bar {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: transform var(--transition), opacity var(--transition);
}
.menu-toggle.active .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.active .bar:nth-child(2) { opacity: 0; }
.menu-toggle.active .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
    min-height: 92vh;
    display: flex;
    align-items: center;
    padding: 140px 0 80px;
}

.profile-section {
    display: grid;
    grid-template-columns: 1.25fr 0.75fr;
    gap: 64px;
    align-items: center;
}

.greeting {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent-secondary);
    display: inline-flex;
    align-items: center;
    gap: 10px;
}
.greeting::before {
    content: "";
    width: 28px;
    height: 1px;
    background: var(--accent-secondary);
    display: inline-block;
}

h1.name {
    font-family: var(--font-heading);
    font-size: clamp(3rem, 7vw, 5rem);
    font-weight: 600;
    line-height: 1.05;
    letter-spacing: -0.02em;
    margin: 14px 0 10px;
    background: linear-gradient(100deg, #102b3a 15%, #087ea4 60%, #d85d3f 95%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.tagline {
    font-size: clamp(1.15rem, 2.4vw, 1.5rem);
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 26px;
}
.tagline .highlight {
    color: var(--text-primary);
    font-style: italic;
    font-family: var(--font-heading);
}
.tagline .rotating {
    display: inline-block;
    min-width: 1ch;
    color: var(--text-primary);
    font-style: italic;
    font-family: var(--font-heading);
    border-bottom: 2px solid var(--accent-primary);
}

.bio-text p { color: var(--text-secondary); margin-bottom: 14px; max-width: 58ch; }
.bio-text .sub-bio { font-size: 0.95rem; }
.bio-text a { color: var(--accent-secondary); }
.bio-text a:hover { text-decoration: underline; }

.contact-info {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 22px;
    margin: 24px 0;
}
.info-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-family: var(--font-mono);
}
.info-item i { color: var(--accent-primary); font-size: 0.85rem; }

.social-links { display: flex; gap: 12px; margin-top: 8px; }
.social-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    border: 1px solid var(--border-subtle);
    background: var(--bg-card);
    font-size: 1.05rem;
    transition: transform var(--transition), color var(--transition),
                border-color var(--transition), box-shadow var(--transition);
}
.social-btn:hover {
    color: var(--text-primary);
    border-color: var(--accent-primary);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px var(--accent-glow);
}

/* Profile portrait */
.profile-visual { display: flex; justify-content: center; }
.image-wrapper {
    position: relative;
    width: min(340px, 80vw);
    aspect-ratio: 4 / 5;
    border-radius: var(--radius-lg);
    padding: 3px;
    background: conic-gradient(from var(--ring, 0deg), #087ea4, #0f8f83, #e8935c, #d85d3f, #087ea4);
    animation: ring-spin 8s linear infinite;
}
@property --ring {
    syntax: "<angle>";
    initial-value: 0deg;
    inherits: false;
}
@keyframes ring-spin { to { --ring: 360deg; } }
.image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: calc(var(--radius-lg) - 3px);
    filter: saturate(1.05);
}

/* Hero floating shapes (legacy hooks, disabled) */
.hero-shapes .shape { display: none; }

/* ---------- Section scaffolding ---------- */
section { padding: 90px 0; }

.section-header { margin-bottom: 48px; }
.section-header h2 {
    font-family: var(--font-heading);
    font-size: clamp(1.9rem, 4vw, 2.6rem);
    font-weight: 600;
    letter-spacing: -0.01em;
}
.section-header p {
    color: var(--text-tertiary);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-top: 8px;
}

/* Page hero (interior pages) */
.page-hero {
    padding: 160px 0 30px;
}
.page-hero .eyebrow {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--accent-secondary);
}
.page-hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(2.4rem, 6vw, 3.8rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.1;
    margin-top: 12px;
    background: linear-gradient(100deg, #102b3a 25%, #087ea4 70%, #d85d3f 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.page-hero .lede {
    color: var(--text-secondary);
    max-width: 64ch;
    margin-top: 18px;
    font-size: 1.05rem;
}

/* Keyword marquee */
.marquee {
    overflow: hidden;
    border-block: 1px solid var(--border-subtle);
    padding: 16px 0;
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
    mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}
.marquee-track {
    display: flex;
    gap: 48px;
    width: max-content;
    animation: marquee 36s linear infinite;
}
.marquee-track span {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-tertiary);
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 48px;
}
.marquee-track span::after { content: "✦"; color: var(--accent-primary); }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- Project cards ---------- */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 28px;
}

.project-tile {
    position: relative;
    display: flex;
    flex-direction: column;
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    overflow: hidden;
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.project-tile:hover {
    transform: translateY(-6px);
    border-color: rgba(8, 126, 164, 0.50);
    box-shadow: 0 24px 60px -24px var(--accent-glow);
}

.project-image { position: relative; aspect-ratio: 16 / 10; overflow: hidden; }
.project-image a { display: block; height: 100%; }
.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.7s cubic-bezier(0.22, 1, 0.36, 1), filter 0.5s ease;
    filter: saturate(0.9);
}
.project-tile:hover .project-image img { transform: scale(1.06); filter: saturate(1.1); }
.project-image .overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(12, 38, 53, 0.60);
    backdrop-filter: blur(2px);
    opacity: 0;
    transition: opacity var(--transition);
}
.project-image .overlay span {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.5);
    padding: 10px 20px;
    border-radius: 999px;
}
.project-tile:hover .overlay { opacity: 1; }

.project-info {
    padding: 26px 26px 28px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex: 1;
}
.project-info .category {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent-secondary);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.project-info h3 {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 600;
    line-height: 1.25;
}
.project-info > p { color: var(--text-secondary); font-size: 0.95rem; }

.tags { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; list-style: none; }
.tags span {
    font-size: 0.74rem;
    font-family: var(--font-mono);
    color: var(--text-secondary);
    padding: 4px 12px;
    border-radius: 999px;
    border: 1px solid var(--border-subtle);
    background: #ffffff;
}

.btn-link {
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 0.92rem;
    color: var(--accent-primary);
}
.btn-link i { transition: transform var(--transition); }
.btn-link:hover { color: var(--text-primary); }
.btn-link:hover i { transform: translateX(5px); }

/* Buttons */
.view-all-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 13px 30px;
    border-radius: 999px;
    border: 1px solid var(--border-strong);
    background: #ffffff;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.95rem;
    font-family: var(--font-body);
    transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.view-all-btn:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 10px 32px -8px var(--accent-glow);
    transform: translateY(-2px);
    color: var(--text-primary);
}
.center-btn { text-align: center; margin-top: 48px; }

/* ---------- Publications ---------- */
.publications-container, .publication-preview { max-width: 880px; }

.publication-year {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 600;
    margin: 56px 0 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    color: var(--text-primary);
}
.publication-year::after {
    content: "";
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--border-strong), transparent);
}
.publication-year i { color: var(--accent-primary); font-size: 1.1rem; }
.publications-container > .publication-year:first-of-type { margin-top: 0; }

.publication-item {
    display: flex;
    gap: 20px;
    padding: 24px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
    background: var(--bg-card);
    margin-bottom: 16px;
    transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.publication-item:hover {
    border-color: rgba(15, 143, 131, 0.45);
    transform: translateX(4px);
    box-shadow: 0 12px 36px -16px rgba(15, 143, 131, 0.22);
}

.pub-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(8, 126, 164, 0.10);
    color: var(--accent-primary);
    font-size: 1rem;
}

.pub-content { flex: 1; min-width: 0; }
.pub-content h3 {
    font-family: var(--font-body);
    font-size: 1.05rem;
    font-weight: 600;
    line-height: 1.45;
    margin-bottom: 6px;
}
.authors { font-size: 0.88rem; color: var(--text-secondary); margin-bottom: 2px; }
.authors .me { color: var(--accent-secondary); font-weight: 600; }
.venue {
    font-size: 0.84rem;
    color: var(--text-tertiary);
    font-style: italic;
    margin-bottom: 10px;
}

.publication-links { display: flex; flex-wrap: wrap; gap: 8px; }
.pill-btn, .citation-button, .copy-button {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 0.74rem;
    padding: 5px 14px;
    border-radius: 999px;
    border: 1px solid var(--border-subtle);
    background: #ffffff;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color var(--transition), border-color var(--transition);
}
.pill-btn:hover, .citation-button:hover, .copy-button:hover {
    color: var(--text-primary);
    border-color: var(--accent-primary);
}
.citation-button { vertical-align: middle; margin-left: 8px; }

.hidden-citation {
    display: none;
    margin-top: 14px;
    position: relative;
}
.hidden-citation pre {
    background: #f0f5f7;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 16px;
    padding-top: 44px;
    font-family: var(--font-mono);
    font-size: 0.74rem;
    line-height: 1.6;
    color: var(--text-secondary);
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-word;
}
.hidden-citation .copy-button {
    position: absolute;
    top: 8px;
    right: 8px;
}

.award-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    padding: 4px 12px;
    border-radius: 999px;
    color: var(--accent-tertiary);
    border: 1px solid rgba(216, 93, 63, 0.4);
    background: rgba(216, 93, 63, 0.08);
    margin-bottom: 8px;
}

/* ---------- CV ---------- */
.cv-container { max-width: 880px; padding-bottom: 40px; }

.cv-section { margin-bottom: 64px; }
.cv-section h3 {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 600;
    margin-bottom: 28px;
    display: flex;
    align-items: center;
    gap: 14px;
}
.cv-section h3 i { color: var(--accent-primary); font-size: 1.15rem; }
.cv-section > h4 {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent-secondary);
    margin: 28px 0 12px;
}

.cv-item {
    position: relative;
    padding: 22px 26px;
    margin-bottom: 18px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
    background: var(--bg-card);
    border-left: 3px solid var(--accent-primary);
    transition: border-color var(--transition), transform var(--transition);
}
.cv-item:hover { transform: translateX(4px); border-left-color: var(--accent-secondary); }
.cv-item h4 {
    font-size: 1.08rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}
.cv-item h4 i { color: var(--accent-secondary); font-size: 0.95rem; }
.cv-item .date {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-tertiary);
    margin: 4px 0 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.cv-item > p { color: var(--text-secondary); font-size: 0.95rem; margin-bottom: 6px; }
.cv-item p strong { color: var(--text-primary); font-family: var(--font-mono); font-size: 0.85rem; }
.cv-item p i { color: var(--accent-primary); width: 18px; }
.cv-item ul { margin-top: 10px; color: var(--text-secondary); font-size: 0.93rem; }
.cv-item li { margin-bottom: 8px; }
.cv-item li i { color: var(--accent-secondary); margin-right: 6px; }
.cv-item a { color: var(--accent-secondary); }
.cv-item a:hover { text-decoration: underline; }
.recognition { font-size: 0.82rem; color: var(--text-tertiary); font-style: italic; margin-top: 10px; }

.download-cv { text-align: center; margin: 56px 0 20px; }

/* ---------- Portfolio / intro ---------- */
.portfolio-container { padding-bottom: 40px; }
.portfolio-container h3.section-header {
    font-family: var(--font-heading);
    font-size: 2rem;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 14px;
}
.portfolio-container h3.section-header i { color: var(--accent-primary); }
.portfolio-intro {
    padding: 28px 32px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
    background: var(--bg-card);
}

/* ---------- Contact ---------- */
.contact-container { max-width: 720px; margin-inline: auto; padding-bottom: 60px; }
.contact-form {
    padding: 36px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-subtle);
    background: var(--bg-card);
    backdrop-filter: blur(8px);
}
.form-group { margin-bottom: 22px; }
.form-group label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 8px;
}
.form-group label i { color: var(--accent-primary); margin-right: 6px; }
.form-group input, .form-group textarea {
    width: 100%;
    padding: 13px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
    background: #ffffff;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(8, 126, 164, 0.15);
}
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--text-tertiary); }

/* ---------- Project detail pages ---------- */
.project-detail { max-width: 880px; margin-inline: auto; padding-bottom: 60px; }

.project-header { margin-bottom: 36px; }
.project-header h2 {
    font-family: var(--font-heading);
    font-size: clamp(1.9rem, 4.5vw, 2.8rem);
    font-weight: 600;
    line-height: 1.15;
    letter-spacing: -0.015em;
    background: linear-gradient(100deg, #102b3a 25%, #087ea4 70%, #d85d3f 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.project-header .date {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-secondary);
    margin-top: 10px;
    letter-spacing: 0.1em;
}

.project-image-large {
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-subtle);
    margin-bottom: 40px;
}

.project-content h3 {
    font-family: var(--font-heading);
    font-size: 1.55rem;
    font-weight: 600;
    margin: 52px 0 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}
.project-content h3 i { color: var(--accent-primary); font-size: 1.1rem; }
.project-content h4 { font-size: 1.08rem; font-weight: 600; margin: 28px 0 10px; }
.project-content h5 {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent-secondary);
    margin: 18px 0 6px;
}
.project-content p { color: var(--text-secondary); margin-bottom: 16px; }
.project-content ul, .project-content ol { color: var(--text-secondary); margin-bottom: 16px; }
.project-content li { margin-bottom: 8px; }
.project-content strong { color: var(--text-primary); }

.two-column {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    align-items: start;
    margin: 24px 0;
}

.method-box, .persona-card, .stat-box {
    padding: 24px 26px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
    background: var(--bg-card);
}
.method-box h4, .persona-card h4, .stat-box h4 { margin-top: 0; }
.persona-card { border-top: 3px solid var(--accent-primary); }
.persona-divider { height: 1px; background: var(--border-subtle); margin: 18px 0; }
.persona-meta ul { font-size: 0.92rem; }

.stat-highlight {
    display: inline-flex;
    align-items: baseline;
    gap: 14px;
    padding: 18px 26px;
    margin: 8px 16px 8px 0;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
    background: var(--bg-card);
}
.stat-highlight strong {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.stat-highlight p { margin: 0 !important; font-size: 0.9rem; }

.sketch-gallery { display: grid; gap: 28px; margin: 24px 0; }
.sketch-item img { border-radius: var(--radius-md); border: 1px solid var(--border-subtle); }
.sketch-caption { font-size: 0.85rem; color: var(--text-tertiary); margin-top: 10px; font-style: italic; }

.image-placeholder img { border-radius: var(--radius-md); }

.publication-card {
    padding: 26px 28px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(8, 126, 164, 0.35);
    background: linear-gradient(135deg, rgba(8, 126, 164, 0.06), rgba(15, 143, 131, 0.05));
    margin: 24px 0;
}
.publication-card h4 { margin-top: 0 !important; font-size: 1.05rem; }
.publication-card .authors { margin: 8px 0 2px; }

.team-members { display: flex; flex-wrap: wrap; gap: 20px; margin: 20px 0; }
.team-member {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 20px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
    background: var(--bg-card);
}
.team-member-avatar { width: 56px; height: 56px; border-radius: 50%; overflow: hidden; flex-shrink: 0; }
.team-member-avatar img { width: 100%; height: 100%; object-fit: cover; }
.team-member-info h4 { margin: 0; font-size: 1rem; }
.team-member-info p { margin: 0 !important; font-size: 0.82rem; color: var(--text-tertiary); }

/* Roadmap (project pages) */
.project-roadmap {
    display: flex;
    justify-content: space-between;
    margin: 12px 0 48px;
    position: sticky;
    top: 76px;
    z-index: 50;
    padding: 14px 22px;
    border-radius: 999px;
    border: 1px solid var(--border-subtle);
    background: rgba(244, 248, 250, 0.94);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}
.roadmap-item {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    flex: 1;
}
.roadmap-item:last-child { flex: 0; }
.roadmap-circle {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    border: 1px solid var(--border-strong);
    color: var(--text-secondary);
    flex-shrink: 0;
    transition: all var(--transition);
}
.roadmap-item.active .roadmap-circle,
.roadmap-item.completed .roadmap-circle {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: #ffffff;
    box-shadow: 0 0 16px var(--accent-glow);
}
.roadmap-label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-tertiary);
    transition: color var(--transition);
    white-space: nowrap;
}
.roadmap-item.active .roadmap-label { color: var(--text-primary); }
.roadmap-line {
    flex: 1;
    height: 1px;
    background: var(--border-subtle);
    margin: 0 8px;
    min-width: 12px;
}
.process-stage { scroll-margin-top: 170px; }

/* ---------- Footer ---------- */
footer {
    border-top: 1px solid var(--border-subtle);
    padding: 48px 0;
    margin-top: 40px;
    background: #ffffff;
}
.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    text-align: center;
}
.footer-logo { font-family: var(--font-heading); font-size: 1.3rem; font-weight: 600; }
.footer-links { display: flex; gap: 22px; }
.footer-links a { color: var(--text-secondary); font-size: 0.9rem; }
.footer-links a:hover { color: var(--accent-secondary); }
footer p { color: var(--text-tertiary); font-size: 0.84rem; }

/* ---------- Reveal on scroll ---------- */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
                transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
    transition-delay: var(--reveal-delay, 0s);
}
.reveal.visible { opacity: 1; transform: none; }

/* ---------- Legacy cursor (disabled) ---------- */
.cursor-dot, .cursor-outline { display: none; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
    .profile-section { grid-template-columns: 1fr; gap: 40px; }
    .profile-visual { order: -1; }
    .image-wrapper { width: min(240px, 70vw); }
    .two-column { grid-template-columns: 1fr; }
    .hero { padding-top: 120px; min-height: unset; }
}

@media (max-width: 768px) {
    body { font-size: 16px; }
    .menu-toggle { display: flex; }
    .nav-menu {
        position: fixed;
        inset: 0;
        background: rgba(244, 248, 250, 0.97);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        display: flex;
        align-items: center;
        justify-content: center;
        opacity: 0;
        pointer-events: none;
        transition: opacity var(--transition);
    }
    .nav-menu.active { opacity: 1; pointer-events: auto; }
    .nav-menu ul { flex-direction: column; text-align: center; gap: 18px; }
    .nav-menu a { font-size: 1.3rem; font-family: var(--font-heading); }
    .publication-item { flex-direction: column; gap: 14px; }
    .project-roadmap { display: none; }
    section { padding: 64px 0; }
    .page-hero { padding-top: 130px; }
    .contact-form { padding: 26px 20px; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .aurora::before, .aurora::after, .marquee-track, .image-wrapper { animation: none; }
    .reveal { opacity: 1; transform: none; transition: none; }
    *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}