/* ==========================================================================
   Redwan Ahamad Samir - Research Profile
   Midnight & Champagne - refined dark academic theme
   ========================================================================== */

:root {
    /* Surfaces: blue-black midnight, layered */
    --bg-primary: #080a12;
    --bg-secondary: #0d1019;
    --bg-tertiary: #131726;
    --bg-card: #101421;
    --bg-raised: #171c2c;

    /* Text: warm ivory on midnight */
    --text-primary: #efe9dc;
    --text-secondary: #aeab9f;
    --text-muted: #86867f;

    /* Accents: champagne gold with a cool slate counterpoint */
    --accent-primary: #d9bf8c;
    --accent-secondary: #8b9cc4;
    --accent-gold: #d9bf8c;
    --accent-deep: #b39455;
    --accent-rgb: 217, 191, 140;

    /* Lines */
    --border-color: rgba(217, 191, 140, 0.16);
    --border-light: rgba(239, 233, 220, 0.07);
    --hair: rgba(217, 191, 140, 0.14);
    --hair-strong: rgba(217, 191, 140, 0.34);

    /* Type */
    --font-primary: 'Hanken Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Fraunces', 'Iowan Old Style', Georgia, serif;

    /* Layout */
    --section-padding: 120px;
    --container-max: 1180px;
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;

    /* Motion */
    --ease-soft: cubic-bezier(0.22, 0.61, 0.36, 1);
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: 0.2s var(--ease-soft);
    --transition-base: 0.25s var(--ease-soft);
    --transition-slow: 0.45s var(--ease-out);

    /* Depth */
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 10px 40px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 24px 80px rgba(0, 0, 0, 0.5);
    --glow: 0 0 60px rgba(217, 191, 140, 0.12);

    /* Scroll position, written by main.js for parallax */
    --sy: 0;

    color-scheme: dark;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    position: relative;
    font-family: var(--font-primary);
    font-size: 1rem;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.65;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    animation: page-in 0.3s var(--ease-soft) both;
}

body.is-leaving {
    opacity: 0;
    transition: opacity 0.22s ease;
}

@keyframes page-in {
    from { opacity: 0; }
    to   { opacity: 1; }
}

::selection {
    background: rgba(var(--accent-rgb), 0.28);
    color: var(--text-primary);
}

@property --mx { syntax: '<length>'; inherits: false; initial-value: 200px; }
@property --my { syntax: '<length>'; inherits: false; initial-value: 0px; }

/* Ambient aurora: two slow champagne and slate glows, fixed behind everything */
body::before {
    content: "";
    position: fixed;
    inset: -20vmax;
    z-index: -1;
    pointer-events: none;
    background:
        radial-gradient(40vmax 40vmax at 82% 8%, rgba(217, 191, 140, 0.10), transparent 70%),
        radial-gradient(46vmax 46vmax at 6% 78%, rgba(98, 118, 170, 0.10), transparent 70%);
}

/* Fine film grain adds tactility to flat dark fields */
body::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    opacity: 0.03;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='180' height='180'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 0.9 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

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

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

a:hover {
    color: var(--text-primary);
}

:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 3px;
    border-radius: 6px;
}

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 400;
    line-height: 1.18;
    letter-spacing: -0.012em;
    color: var(--text-primary);
    font-variation-settings: "opsz" 96;
}

h1 { font-size: clamp(2.4rem, 5.4vw, 4.4rem); font-weight: 300; letter-spacing: -0.028em; }
h2 { font-size: clamp(1.8rem, 3.4vw, 2.8rem); font-weight: 350; letter-spacing: -0.02em; }
h3 { font-size: clamp(1.2rem, 1.9vw, 1.5rem); font-variation-settings: "opsz" 36; }
h4 { font-size: 1.05rem; font-variation-settings: "opsz" 24; }

p {
    color: var(--text-secondary);
}

strong {
    color: var(--text-primary);
    font-weight: 600;
}

.lead {
    font-family: var(--font-serif);
    font-size: clamp(1.25rem, 2vw, 1.6rem);
    font-weight: 300;
    color: var(--text-primary);
    line-height: 1.55;
    letter-spacing: -0.01em;
    font-variation-settings: "opsz" 36;
}

/* ---------- Layout ---------- */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 28px;
}

.section {
    position: relative;
    padding: var(--section-padding) 0;
}

.section-header {
    margin-bottom: 64px;
    max-width: 640px;
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(1.9rem, 3.6vw, 3rem);
    font-weight: 330;
    letter-spacing: -0.024em;
    line-height: 1.1;
    margin-bottom: 0;
}

.container > .section-title {
    margin-bottom: 52px;
}

.section-subtitle {
    margin-top: 16px;
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 52ch;
}

.section-footer {
    margin-top: 56px;
    display: flex;
    justify-content: center;
}

/* ---------- Navigation: a floating glass bar ---------- */
.navbar {
    position: fixed;
    top: 14px;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 0 16px;
    pointer-events: none;
    animation: nav-in 0.5s var(--ease-out) 0.05s both;
}

@keyframes nav-in {
    from { opacity: 0; transform: translateY(-18px); }
    to   { opacity: 1; transform: none; }
}

.nav-container {
    position: relative;
    pointer-events: auto;
    max-width: 1080px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 9px 12px 9px 26px;
    border-radius: 999px;
    background: rgba(13, 16, 25, 0.86);
    border: 1px solid var(--border-light);
    transition: background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.navbar.scrolled .nav-container {
    background: rgba(9, 11, 19, 0.82);
    border-color: var(--hair);
    box-shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
}

.nav-logo {
    font-family: var(--font-serif);
    font-size: 1.45rem;
    font-weight: 400;
    letter-spacing: 0.06em;
    color: var(--accent-primary);
    font-variation-settings: "opsz" 72;
}

.nav-logo:hover {
    color: var(--text-primary);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
}

.nav-link {
    position: relative;
    display: block;
    padding: 9px 18px;
    border-radius: 999px;
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition-base), background var(--transition-base);
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(239, 233, 220, 0.05);
}

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

.hamburger {
    display: none;
    width: 42px;
    height: 42px;
    padding: 0;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border-radius: 50%;
    cursor: pointer;
    transition: background var(--transition-base);
}

.hamburger:hover {
    background: rgba(239, 233, 220, 0.06);
}

.bar {
    display: block;
    width: 20px;
    height: 1.5px;
    background: var(--accent-primary);
    border-radius: 2px;
    transition: transform 0.4s var(--ease-out), opacity 0.25s ease;
}

.hamburger.active .bar:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.hamburger.active .bar:nth-child(2) { opacity: 0; }
.hamburger.active .bar:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* Scroll progress and cursor glow are injected by main.js */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    z-index: 200;
    transform-origin: 0 50%;
    transform: scaleX(0);
    background: linear-gradient(90deg, transparent, var(--accent-primary) 30%, #f1e1bd);
    pointer-events: none;
}

.cursor-glow {
    position: fixed;
    top: 0;
    left: 0;
    width: 520px;
    height: 520px;
    margin: -260px 0 0 -260px;
    z-index: 0;
    pointer-events: none;
    opacity: 0;
    background: radial-gradient(circle, rgba(217, 191, 140, 0.075), transparent 62%);
    transition: opacity 0.6s ease;
    will-change: transform;
}

.cursor-glow.on {
    opacity: 1;
}

/* ---------- Hero ---------- */
.hero {
    position: relative;
    min-height: 100vh;
    min-height: 100svh;
    display: flex;
    align-items: center;
    padding: 150px 0 110px;
    overflow: hidden;
}

.hero-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 0;
    animation: fade-in 1.2s ease 0.2s forwards;
    -webkit-mask-image: radial-gradient(ellipse 70% 80% at 78% 46%, #000 20%, transparent 78%);
    mask-image: radial-gradient(ellipse 70% 80% at 78% 46%, #000 20%, transparent 78%);
}

@keyframes fade-in {
    to { opacity: 1; }
}

.hero-container {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 28px;
}

.hero-content {
    max-width: 820px;
}

.hero-subtitle {
    font-family: var(--font-serif);
    font-style: italic;
    font-weight: 300;
    font-size: clamp(1.05rem, 1.6vw, 1.3rem);
    color: var(--accent-primary);
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 16px;
    font-variation-settings: "opsz" 24;
}

.hero-subtitle::before {
    content: "";
    width: 44px;
    height: 1px;
    background: var(--accent-primary);
    transform-origin: left;
    animation: line-draw 0.9s var(--ease-out) 0.15s both;
}

@keyframes line-draw {
    from { transform: scaleX(0); }
    to   { transform: scaleX(1); }
}

.hero-title {
    font-size: clamp(3.3rem, 9.4vw, 7.6rem);
    font-weight: 270;
    line-height: 0.98;
    letter-spacing: -0.04em;
    max-width: 8.6em;
    margin-bottom: 36px;
    text-wrap: balance;
    font-variation-settings: "opsz" 144;
}

.hero-description {
    max-width: 58ch;
    font-size: clamp(1.02rem, 1.4vw, 1.18rem);
    line-height: 1.8;
    color: var(--text-secondary);
}

.highlight {
    color: var(--text-primary);
    background-image: linear-gradient(var(--accent-primary), var(--accent-primary));
    background-repeat: no-repeat;
    background-position: 0 100%;
    background-size: 100% 1px;
    padding-bottom: 2px;
}

.js .hero .highlight {
    background-size: 0% 1px;
    animation: underline-draw 0.8s var(--ease-out) 0.6s forwards;
}

@keyframes underline-draw {
    to { background-size: 100% 1px; }
}

.hero-stats {
    display: flex;
    flex-wrap: wrap;
    margin: 52px 0 44px;
    border-top: 1px solid var(--hair);
    border-bottom: 1px solid var(--hair);
    max-width: 640px;
}

.stat-item {
    flex: 1 1 0;
    min-width: 150px;
    padding: 24px 28px 24px 0;
    margin-right: 28px;
    border-right: 1px solid var(--hair);
}

.stat-item:last-child {
    border-right: none;
    margin-right: 0;
}

.stat-number {
    display: block;
    font-family: var(--font-serif);
    font-size: clamp(2.2rem, 4vw, 3.1rem);
    font-weight: 280;
    line-height: 1;
    color: var(--text-primary);
    font-variant-numeric: lining-nums tabular-nums;
    font-variation-settings: "opsz" 96;
}

.stat-label {
    display: block;
    margin-top: 10px;
    font-size: 0.88rem;
    color: var(--text-secondary);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.hero-social {
    display: flex;
    gap: 12px;
    margin-top: 40px;
}

.social-link {
    width: 46px;
    height: 46px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
    background: rgba(239, 233, 220, 0.02);
    transition: transform var(--transition-base), border-color var(--transition-base), color var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
}

.social-link:hover {
    transform: translateY(-4px);
    color: var(--accent-primary);
    border-color: var(--hair-strong);
    background: rgba(var(--accent-rgb), 0.07);
    box-shadow: 0 10px 30px rgba(217, 191, 140, 0.12);
}

/* Staged hero entrance: one orchestrated sequence on load */
.js .hero-content > * {
    opacity: 0;
    animation: rise 0.7s var(--ease-out) forwards;
}

.js .hero-content > :nth-child(1) { animation-delay: 0.08s; }
.js .hero-content > :nth-child(2) { animation-delay: 0.14s; }
.js .hero-content > :nth-child(3) { animation-delay: 0.2s; }
.js .hero-content > :nth-child(4) { animation-delay: 0.26s; }
.js .hero-content > :nth-child(5) { animation-delay: 0.32s; }
.js .hero-content > :nth-child(6) { animation-delay: 0.38s; }

@keyframes rise {
    from { opacity: 0; transform: translateY(26px); }
    to   { opacity: 1; transform: none; }
}

.hero-scroll {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 30px;
    z-index: 2;
    display: flex;
    justify-content: center;
}

.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    font-size: 0.8rem;
    color: var(--text-muted);
    letter-spacing: 0.08em;
}

.scroll-indicator:hover {
    color: var(--accent-primary);
}

.scroll-indicator i {
    font-size: 0.8rem;
    animation: float-down 2.6s ease-in-out infinite;
}

@keyframes float-down {
    0%, 100% { transform: translateY(0); opacity: 0.5; }
    50%      { transform: translateY(7px); opacity: 1; }
}

/* ---------- Buttons ---------- */
.btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 30px;
    border-radius: 999px;
    border: 1px solid transparent;
    font-family: var(--font-primary);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.005em;
    line-height: 1.2;
    cursor: pointer;
    overflow: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base), border-color var(--transition-base), color var(--transition-base);
}

.btn:active {
    transform: translateY(0) scale(0.98);
}

.btn-primary {
    color: #0b0d15;
    background: linear-gradient(135deg, #ecd6a6 0%, #d3b377 55%, #c4a263 100%);
    box-shadow: 0 10px 34px rgba(217, 191, 140, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.btn-primary::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(110deg, transparent 30%, rgba(255, 255, 255, 0.38) 50%, transparent 70%);
    transform: translateX(-120%);
    transition: transform 0.9s var(--ease-out);
}

.btn-primary:hover {
    color: #0b0d15;
    transform: translateY(-3px);
    box-shadow: 0 16px 44px rgba(217, 191, 140, 0.32), inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

.btn-primary:hover::after {
    transform: translateX(120%);
}

.btn-secondary {
    color: var(--text-primary);
    background: rgba(239, 233, 220, 0.03);
    border-color: rgba(239, 233, 220, 0.16);
}

.btn-secondary:hover {
    color: var(--accent-primary);
    border-color: var(--hair-strong);
    background: rgba(var(--accent-rgb), 0.07);
    transform: translateY(-3px);
}

.btn-outline {
    color: var(--accent-primary);
    background: transparent;
    border-color: var(--hair-strong);
}

.btn-outline:hover {
    color: #0b0d15;
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    transform: translateY(-3px);
    box-shadow: 0 14px 40px rgba(217, 191, 140, 0.22);
}

.btn-sm {
    padding: 10px 20px;
    font-size: 0.85rem;
}

.btn-full {
    width: 100%;
}

.btn i {
    font-size: 0.9em;
}

button.btn {
    font-family: var(--font-primary);
}

/* ---------- Scroll reveal: soft rise, staggered by sibling position ---------- */
.js .featured-card,
.js .focus-card,
.js .update-item,
.js .publication-card,
.js .project-card,
.js .blog-card,
.js .cert-card,
.js .skill-category,
.js .timeline-item,
.js .overview-card,
.js .opensource-card,
.js .info-card,
.js .profile-photo-card,
.js .research-project,
.js .newsletter-box,
.js .contact-form-wrapper,
.js .section-header,
.js .container > .section-title,
.js .cta-content {
    opacity: 0;
    transform: translateY(26px);
    transition:
        opacity 0.55s var(--ease-out),
        transform 0.55s var(--ease-out),
        border-color var(--transition-base),
        background var(--transition-base),
        box-shadow var(--transition-base);
    transition-delay: calc(var(--i, 0) * 45ms), calc(var(--i, 0) * 45ms), 0s, 0s, 0s;
}

.js .is-in {
    opacity: 1 !important;
    transform: none !important;
    filter: none !important;
}

/* Cards that respond to hover must not keep the reveal delay */
.js .is-in.is-settled {
    transition-delay: 0s;
}

/* ---------- Shared card surface with cursor spotlight ---------- */
.featured-card,
.project-card,
.publication-card,
.cert-card,
.info-card,
.opensource-card,
.overview-card,
.research-project,
.blog-card,
.timeline-content,
.contact-form-wrapper,
.newsletter-box {
    position: relative;
    background: linear-gradient(160deg, rgba(23, 28, 44, 0.72), rgba(14, 17, 28, 0.72));
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    isolation: isolate;
    overflow: hidden;
}

.featured-card::before,
.project-card::before,
.publication-card::before,
.cert-card::before,
.info-card::before,
.opensource-card::before,
.overview-card::before,
.research-project::before,
.blog-card::before,
.timeline-content::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 440px;
    height: 440px;
    z-index: -1;
    pointer-events: none;
    opacity: 0;
    background: radial-gradient(circle, rgba(217, 191, 140, 0.11), transparent 65%);
    transform: translate3d(calc(var(--mx) - 220px), calc(var(--my) - 220px), 0);
    transition: opacity 0.35s ease;
}

.featured-card:hover::before,
.project-card:hover::before,
.publication-card:hover::before,
.cert-card:hover::before,
.info-card:hover::before,
.opensource-card:hover::before,
.overview-card:hover::before,
.research-project:hover::before,
.blog-card:hover::before,
.timeline-content:hover::before {
    opacity: 1;
}

.featured-card:hover,
.project-card:hover,
.publication-card:hover,
.cert-card:hover,
.opensource-card:hover,
.overview-card:hover,
.blog-card:hover,
.timeline-content:hover {
    border-color: var(--hair-strong);
}

/* ---------- Featured research (home) ---------- */
.featured-section {
    background: linear-gradient(180deg, transparent, rgba(13, 16, 25, 0.7) 20%, rgba(13, 16, 25, 0.7) 80%, transparent);
}

.featured-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
}

.featured-card {
    display: flex;
    flex-direction: column;
    padding: 36px 32px 32px;
}

.featured-card:hover {
    transform: translateY(-6px) !important;
    box-shadow: var(--shadow-md);
}

.featured-meta {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 22px;
}

.featured-year {
    padding: 4px 12px;
    border-radius: 999px;
    border: 1px solid var(--hair-strong);
    color: var(--accent-primary);
    font-size: 0.8rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.featured-venue {
    font-size: 0.88rem;
    color: var(--text-secondary);
}

.featured-title {
    font-size: 1.32rem;
    line-height: 1.32;
    margin-bottom: 16px;
}

.featured-excerpt {
    font-size: 0.96rem;
    line-height: 1.75;
    margin-bottom: 24px;
}

.featured-tags,
.project-tags,
.keywords-list,
.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.featured-tags {
    margin-bottom: 30px;
}

.tag,
.keyword,
.tech-tag {
    display: inline-block;
    padding: 5px 13px;
    border-radius: 999px;
    border: 1px solid var(--border-light);
    background: rgba(239, 233, 220, 0.025);
    color: var(--text-secondary);
    font-size: 0.78rem;
    font-weight: 500;
    transition: border-color var(--transition-base), color var(--transition-base), background var(--transition-base);
}

.featured-card:hover .tag,
.project-card:hover .tech-tag,
.publication-card:hover .keyword {
    border-color: var(--hair);
    color: var(--text-primary);
}

.featured-link {
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--accent-primary);
}

.featured-link i {
    font-size: 0.8em;
    transition: transform 0.4s var(--ease-out);
}

.featured-link:hover {
    color: var(--text-primary);
}

.featured-link:hover i {
    transform: translateX(6px);
}

/* ---------- Research focus (home) and research overview ---------- */
.focus-grid,
.overview-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 40px 34px;
}

.overview-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 40px 26px;
}

.focus-card {
    padding-top: 30px;
    border-top: 1px solid var(--hair);
    position: relative;
    transition: border-color var(--transition-base);
}

.focus-card::before {
    content: "";
    position: absolute;
    top: -1px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent-primary);
    transition: width 0.8s var(--ease-out);
}

.focus-card:hover::before {
    width: 100%;
}

.focus-icon {
    font-size: 1.5rem;
    color: var(--accent-primary);
    margin-bottom: 26px;
    transition: transform 0.6s var(--ease-out);
}

.focus-card:hover .focus-icon {
    transform: translateY(-5px);
}

.focus-card h3 {
    margin-bottom: 14px;
}

.focus-card p {
    font-size: 0.95rem;
    line-height: 1.75;
}

.overview-card {
    padding: 32px 28px;
    border-radius: var(--radius-md);
}

.overview-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 22px;
    font-size: 1.15rem;
    color: var(--accent-primary);
    border: 1px solid var(--hair-strong);
    border-radius: 14px;
    background: rgba(var(--accent-rgb), 0.06);
}

.overview-card h3 {
    font-size: 1.15rem;
    margin-bottom: 10px;
}

.overview-card p {
    font-size: 0.92rem;
    line-height: 1.7;
}

.research-overview {
    padding-bottom: 40px;
}

/* ---------- Recent updates (home) ---------- */
.updates-section {
    background: linear-gradient(180deg, transparent, rgba(13, 16, 25, 0.6) 25%, rgba(13, 16, 25, 0.6) 75%, transparent);
}

.updates-list {
    max-width: 920px;
    border-bottom: 1px solid var(--hair);
}

.update-item {
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: 40px;
    padding: 38px 0;
    border-top: 1px solid var(--hair);
    transition: padding-left 0.6s var(--ease-out), border-color var(--transition-base);
}

.update-item:hover {
    padding-left: 14px;
    border-top-color: var(--hair-strong);
}

.update-date {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.date-month {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-primary);
    letter-spacing: 0.04em;
}

.date-day {
    font-family: var(--font-serif);
    font-size: 2.3rem;
    font-weight: 250;
    line-height: 1;
    color: var(--text-primary);
    font-variant-numeric: lining-nums tabular-nums;
    font-variation-settings: "opsz" 96;
}

.update-content h4 {
    font-size: 1.4rem;
    margin-bottom: 12px;
    transition: color var(--transition-base);
}

.update-item:hover .update-content h4 {
    color: var(--accent-primary);
}

.update-content p {
    max-width: 62ch;
    line-height: 1.75;
}

/* ---------- Contact ---------- */
.contact-section {
    border-top: 1px solid var(--hair);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.05fr;
    gap: 96px;
    align-items: start;
}

.contact-info .section-title {
    margin-bottom: 22px;
}

.contact-description {
    max-width: 46ch;
    font-size: 1.08rem;
    line-height: 1.8;
    margin-bottom: 44px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 26px;
    margin-bottom: 44px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
}

.contact-item > i {
    flex: none;
    width: 46px;
    height: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 1px solid var(--hair-strong);
    color: var(--accent-primary);
    font-size: 0.95rem;
}

.contact-item > div {
    display: flex;
    flex-direction: column;
}

.contact-label {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-bottom: 2px;
}

.contact-item a {
    color: var(--text-primary);
    background-image: linear-gradient(var(--accent-primary), var(--accent-primary));
    background-repeat: no-repeat;
    background-position: 0 100%;
    background-size: 0% 1px;
    transition: background-size 0.5s var(--ease-out), color var(--transition-base);
    align-self: flex-start;
}

.contact-item a:hover {
    color: var(--accent-primary);
    background-size: 100% 1px;
}

.contact-item span:not(.contact-label) {
    color: var(--text-primary);
}

.contact-social {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.social-btn {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    padding: 10px 18px;
    border-radius: 999px;
    border: 1px solid var(--border-light);
    background: rgba(239, 233, 220, 0.025);
    color: var(--text-secondary);
    font-size: 0.86rem;
    font-weight: 500;
    transition: transform var(--transition-base), border-color var(--transition-base), color var(--transition-base), background var(--transition-base);
}

.social-btn:hover {
    transform: translateY(-3px);
    color: var(--accent-primary);
    border-color: var(--hair-strong);
    background: rgba(var(--accent-rgb), 0.06);
}

.contact-form-wrapper {
    padding: 44px;
    border-radius: 28px;
}

.form-group {
    margin-bottom: 26px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.84rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: color var(--transition-base);
}

.form-group:focus-within label {
    color: var(--accent-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 10px 0 12px;
    font-family: var(--font-primary);
    font-size: 1rem;
    color: var(--text-primary);
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--border-light);
    border-radius: 0;
    outline: none;
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
    border-bottom-color: var(--accent-primary);
    box-shadow: 0 1px 0 0 var(--accent-primary);
}

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

/* ---------- Inner page header ---------- */
.page-header {
    position: relative;
    padding: 190px 0 80px;
}

.page-header .container {
    position: relative;
}

.page-header .container::after {
    content: "";
    display: block;
    width: 64px;
    height: 1px;
    margin-top: 40px;
    background: var(--accent-primary);
    transform-origin: left;
    animation: line-draw 0.9s var(--ease-out) 0.15s both;
}

.page-title {
    font-size: clamp(2.8rem, 7.4vw, 5.6rem);
    font-weight: 270;
    line-height: 1;
    letter-spacing: -0.038em;
    margin-bottom: 22px;
    font-variation-settings: "opsz" 144;
}

.page-subtitle {
    font-size: clamp(1.02rem, 1.5vw, 1.2rem);
    color: var(--text-secondary);
    max-width: 52ch;
}

.js .page-title,
.js .page-subtitle {
    opacity: 0;
    animation: rise 0.7s var(--ease-out) forwards;
}

.js .page-title { animation-delay: 0.2s; }
.js .page-subtitle { animation-delay: 0.4s; }

/* ---------- Footer ---------- */
.footer {
    position: relative;
    padding: 80px 0 40px;
    border-top: 1px solid var(--hair);
    background: linear-gradient(180deg, transparent, rgba(5, 6, 11, 0.7));
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    gap: 32px;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 56px;
}

.footer-logo {
    display: block;
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 300;
    letter-spacing: 0.06em;
    color: var(--accent-primary);
    margin-bottom: 8px;
    font-variation-settings: "opsz" 96;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 28px;
}

.footer-links a {
    position: relative;
    color: var(--text-secondary);
    font-size: 0.95rem;
    padding: 4px 0;
}

.footer-links a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 1px;
    background: var(--accent-primary);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.5s var(--ease-out);
}

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

.footer-links a:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

.footer-bottom {
    padding-top: 28px;
    border-top: 1px solid var(--border-light);
}

.footer-bottom p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ---------- About ---------- */
.bio-grid {
    display: grid;
    grid-template-columns: 1.55fr 1fr;
    gap: 88px;
    align-items: start;
}

.bio-content .section-title {
    margin-bottom: 36px;
}

.bio-text p {
    max-width: 64ch;
    font-size: 1.05rem;
    line-height: 1.9;
    margin-bottom: 24px;
}

.bio-text p.lead {
    margin-bottom: 32px;
}

.bio-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 40px;
}

.bio-sidebar {
    display: flex;
    flex-direction: column;
    gap: 22px;
}

.profile-photo-card {
    position: relative;
    overflow: hidden;
    border-radius: 28px;
    border: 1px solid var(--hair);
    background: var(--bg-card);
    box-shadow: var(--shadow-lg), var(--glow);
}

.photo-container {
    position: relative;
    overflow: hidden;
    aspect-ratio: 4 / 4.6;
}

.photo-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 18%;
    transition: transform 0.9s var(--ease-out);
}

.profile-photo-card:hover .photo-container img {
    transform: scale(1.045);
}

.photo-container::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
    background: linear-gradient(180deg, transparent 55%, rgba(8, 10, 18, 0.92));
    pointer-events: none;
}

.photo-container::after {
    content: "";
    position: absolute;
    inset: 12px;
    z-index: 2;
    border-radius: 18px;
    border: 1px solid rgba(217, 191, 140, 0.26);
    pointer-events: none;
}

.photo-caption {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 3;
    padding: 28px 30px 30px;
}

.photo-caption h3 {
    font-size: 1.4rem;
    margin-bottom: 4px;
}

.photo-caption p {
    color: var(--accent-primary);
    font-size: 0.92rem;
}

.info-card {
    padding: 30px;
    border-radius: 22px;
}

.info-card h3 {
    font-size: 1.15rem;
    margin-bottom: 14px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--hair);
}

.info-list {
    list-style: none;
}

.info-list li {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 13px 0;
    border-bottom: 1px solid var(--border-light);
}

.info-list li:last-child {
    border-bottom: none;
}

.info-list li > i {
    flex: none;
    width: 20px;
    margin-top: 4px;
    text-align: center;
    color: var(--accent-primary);
    font-size: 0.9rem;
}

.info-list li > div {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.info-list li strong {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-muted);
}

.info-list li span {
    font-size: 0.95rem;
    color: var(--text-primary);
    overflow-wrap: anywhere;
}

.id-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin: 0 -12px;
}

.id-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px;
    border-radius: 14px;
    color: var(--text-primary);
    transition: background var(--transition-base), transform 0.5s var(--ease-out);
}

.id-item:hover {
    background: rgba(var(--accent-rgb), 0.07);
    transform: translateX(6px);
    color: var(--text-primary);
}

.id-item > i {
    flex: none;
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 1px solid var(--hair);
    color: var(--accent-primary);
    font-size: 0.9rem;
}

.id-item > div {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.id-name {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
}

.id-value {
    font-size: 0.82rem;
    color: var(--text-muted);
    overflow-wrap: anywhere;
}

/* Timelines: a thin gold thread with glowing nodes */
.education-section,
.timeline-section {
    border-top: 1px solid var(--hair);
}

.timeline {
    position: relative;
    max-width: 880px;
    padding-left: 44px;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 6px;
    top: 10px;
    bottom: 10px;
    width: 1px;
    background: linear-gradient(180deg, var(--accent-primary), rgba(217, 191, 140, 0.08));
}

.timeline-item {
    position: relative;
    padding-bottom: 28px;
}

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

.timeline-marker {
    position: absolute;
    left: -44px;
    top: 30px;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background: var(--bg-primary);
    border: 1px solid var(--accent-primary);
}

.timeline-marker::after {
    content: "";
    position: absolute;
    inset: 2px;
    border-radius: 50%;
    background: var(--accent-primary);
    box-shadow: 0 0 14px rgba(217, 191, 140, 0.8);
    animation: node-breathe 4.2s ease-in-out infinite;
}

@keyframes node-breathe {
    0%, 100% { opacity: 0.55; transform: scale(0.8); }
    50%      { opacity: 1;    transform: scale(1); }
}

.timeline-content {
    padding: 28px 32px;
    border-radius: 20px;
}

.timeline-header {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: space-between;
    gap: 8px 24px;
    margin-bottom: 12px;
}

.timeline-header h3 {
    font-size: 1.28rem;
}

.timeline-date {
    font-size: 0.86rem;
    font-weight: 600;
    color: var(--accent-primary);
    font-variant-numeric: tabular-nums;
}

.timeline-institution {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.timeline-detail {
    margin-bottom: 14px;
}

.timeline-meta {
    margin-bottom: 20px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.timeline-courses h4 {
    font-family: var(--font-serif);
    font-style: italic;
    font-weight: 300;
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.timeline-courses ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 28px;
}

.timeline-courses li {
    position: relative;
    padding-left: 20px;
    font-size: 0.93rem;
    color: var(--text-secondary);
}

.timeline-courses li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.62em;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    border: 1px solid var(--accent-primary);
}

/* Certifications */
.cert-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
}

.cert-card {
    padding: 34px 30px;
    border-radius: 20px;
}

.cert-icon {
    width: 54px;
    height: 54px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 26px;
    border-radius: 16px;
    border: 1px solid var(--hair-strong);
    background: rgba(var(--accent-rgb), 0.06);
    color: var(--accent-primary);
    font-size: 1.15rem;
    transition: transform 0.6s var(--ease-out);
}

.cert-card:hover .cert-icon {
    transform: rotate(-6deg) scale(1.06);
}

.cert-card h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.cert-issuer {
    font-size: 0.92rem;
}

/* Skills */
.skills-section {
    border-top: 1px solid var(--hair);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 40px 32px;
}

.skill-category h3 {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.15rem;
    padding-bottom: 18px;
    margin-bottom: 6px;
    border-bottom: 1px solid var(--hair);
}

.skill-category h3 i {
    color: var(--accent-primary);
    font-size: 0.95rem;
}

.skill-list {
    list-style: none;
}

.skill-list li {
    padding: 11px 0;
    font-size: 0.93rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-light);
    transition: color var(--transition-base), padding-left 0.5s var(--ease-out);
}

.skill-list li:last-child {
    border-bottom: none;
}

.skill-list li:hover {
    color: var(--text-primary);
    padding-left: 8px;
}

/* ---------- Research: publications ---------- */
.publications-list {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.publication-card {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 12px;
    padding: 48px 48px 44px 32px;
    border-radius: 28px;
}

.pub-number {
    font-family: var(--font-serif);
    font-size: 3.6rem;
    font-weight: 200;
    line-height: 0.9;
    padding-left: 12px;
    color: rgba(var(--accent-rgb), 0.38);
    font-variant-numeric: lining-nums;
    font-variation-settings: "opsz" 144;
    transition: color 0.6s ease;
}

.publication-card:hover .pub-number {
    color: var(--accent-primary);
}

.pub-header {
    margin-bottom: 22px;
}

.pub-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px 14px;
    margin-bottom: 18px;
}

.pub-year {
    padding: 4px 12px;
    border-radius: 999px;
    border: 1px solid var(--hair-strong);
    color: var(--accent-primary);
    font-size: 0.8rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.pub-venue {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.pub-title {
    font-size: clamp(1.4rem, 2.3vw, 1.85rem);
    font-weight: 380;
    line-height: 1.3;
    letter-spacing: -0.018em;
    max-width: 30em;
}

.pub-authors {
    margin-bottom: 14px;
    font-size: 0.96rem;
    line-height: 1.7;
    color: var(--text-secondary);
}

.pub-authors strong {
    font-weight: 500;
    color: var(--text-muted);
    margin-right: 4px;
}

.author-highlight {
    color: var(--text-primary);
    font-weight: 600;
    background-image: linear-gradient(var(--accent-primary), var(--accent-primary));
    background-repeat: no-repeat;
    background-position: 0 100%;
    background-size: 100% 1px;
    padding-bottom: 1px;
}

.pub-venue-full {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 30px;
    font-size: 0.93rem;
    color: var(--text-secondary);
}

.pub-venue-full i {
    margin-top: 5px;
    color: var(--accent-primary);
}

.pub-abstract {
    margin-bottom: 28px;
    padding-left: 24px;
    border-left: 1px solid var(--hair-strong);
}

.pub-abstract h4,
.pub-keywords h4 {
    font-family: var(--font-serif);
    font-style: italic;
    font-weight: 300;
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.pub-abstract p {
    max-width: 74ch;
    font-size: 0.97rem;
    line-height: 1.85;
}

.pub-keywords {
    margin-bottom: 34px;
}

.pub-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

/* ---------- Research: current project ---------- */
.current-research {
    border-top: 1px solid var(--hair);
}

.research-project {
    padding: 52px;
    border-radius: 30px;
    overflow: hidden;
}

.research-project + .research-project {
    margin-top: 28px;
}

.research-project::after {
    content: "";
    position: absolute;
    top: -160px;
    right: -120px;
    width: 440px;
    height: 440px;
    z-index: -1;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(217, 191, 140, 0.12), transparent 68%);
    pointer-events: none;
}

.project-status {
    margin-bottom: 24px;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    padding: 5px 14px;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.03em;
}

.status-badge::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
    animation: pulse-dot 2.8s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { box-shadow: 0 0 0 0 rgba(217, 191, 140, 0.55); }
    50%      { box-shadow: 0 0 0 6px rgba(217, 191, 140, 0); }
}

.status-badge.active {
    color: var(--accent-primary);
    background: rgba(var(--accent-rgb), 0.1);
    border: 1px solid var(--hair-strong);
}

.status-badge.planning {
    color: var(--accent-secondary);
    background: rgba(139, 156, 196, 0.1);
    border: 1px solid rgba(139, 156, 196, 0.35);
}

.research-project h3 {
    font-size: clamp(1.4rem, 2.4vw, 2rem);
    font-weight: 350;
    line-height: 1.25;
    max-width: 26em;
    margin-bottom: 22px;
}

.project-description {
    max-width: 68ch;
    font-size: 1rem;
    line-height: 1.85;
}

.research-project .project-description {
    margin-bottom: 34px;
}

.project-objectives {
    margin-bottom: 34px;
}

.project-objectives h4 {
    font-family: var(--font-serif);
    font-style: italic;
    font-weight: 300;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.project-objectives ul {
    list-style: none;
    display: grid;
    gap: 12px;
}

.project-objectives li {
    position: relative;
    padding-left: 26px;
    max-width: 72ch;
    font-size: 0.96rem;
    color: var(--text-secondary);
}

.project-objectives li::before {
    content: "";
    position: absolute;
    left: 2px;
    top: 0.65em;
    width: 8px;
    height: 1px;
    background: var(--accent-primary);
}

.tag.is-large {
    padding: 6px 16px;
}

/* ---------- Call to action ---------- */
.cta-section {
    text-align: center;
    border-top: 1px solid var(--hair);
    overflow: hidden;
}

.cta-section::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    width: 760px;
    height: 460px;
    max-width: 100%;
    transform: translate(-50%, -50%);
    background: radial-gradient(ellipse at center, rgba(217, 191, 140, 0.11), transparent 70%);
    pointer-events: none;
}

.cta-content {
    position: relative;
    max-width: 720px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: clamp(2rem, 4.2vw, 3.3rem);
    font-weight: 300;
    margin-bottom: 22px;
}

.cta-content p {
    max-width: 52ch;
    margin: 0 auto 40px;
    font-size: 1.08rem;
    line-height: 1.8;
}

/* ---------- Projects ---------- */
.filter-section {
    padding: 0 0 20px;
}

.filter-bar {
    position: relative;
    display: inline-flex;
    max-width: 100%;
    gap: 2px;
    padding: 6px;
    overflow-x: auto;
    scrollbar-width: none;
    border-radius: 999px;
    border: 1px solid var(--border-light);
    background: rgba(13, 16, 25, 0.8);
}

.filter-bar::-webkit-scrollbar {
    display: none;
}

.filter-btn {
    position: relative;
    z-index: 1;
    flex: none;
    padding: 10px 22px;
    border: none;
    border-radius: 999px;
    background: transparent;
    font-family: var(--font-primary);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color var(--transition-base), background var(--transition-base);
}

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

.filter-btn.active {
    color: var(--accent-primary);
    background: rgba(var(--accent-rgb), 0.12);
}

.filter-indicator {
    position: absolute;
    z-index: 0;
    top: 6px;
    bottom: 6px;
    left: 0;
    border-radius: 999px;
    background: rgba(var(--accent-rgb), 0.12);
    border: 1px solid var(--hair-strong);
    transition: transform 0.55s var(--ease-out), width 0.55s var(--ease-out);
    pointer-events: none;
}

.has-indicator .filter-btn.active {
    background: transparent;
}

.projects-section {
    padding-top: 56px;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
}

.project-card {
    display: flex;
    flex-direction: column;
    padding: 34px 32px 30px;
    border-radius: 24px;
}

.project-card.is-filtering-out {
    opacity: 0 !important;
    transform: scale(0.97) translateY(10px) !important;
    transition: opacity 0.3s ease, transform 0.3s ease !important;
}

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

.project-header {
    display: flex;
    align-items: center;
    gap: 18px;
    margin-bottom: 22px;
}

.project-icon {
    flex: none;
    width: 54px;
    height: 54px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    border: 1px solid var(--hair-strong);
    background: rgba(var(--accent-rgb), 0.06);
    color: var(--accent-primary);
    font-size: 1.15rem;
    transition: transform 0.6s var(--ease-out), background var(--transition-base);
}

.project-card:hover .project-icon {
    transform: translateY(-3px) rotate(-5deg);
    background: rgba(var(--accent-rgb), 0.12);
}

.project-meta {
    min-width: 0;
}

.project-category {
    display: block;
    margin-bottom: 4px;
    font-size: 0.8rem;
    color: var(--accent-primary);
}

.project-title {
    font-size: 1.28rem;
    line-height: 1.25;
}

.project-card .project-description {
    margin-bottom: 20px;
    font-size: 0.95rem;
    line-height: 1.75;
}

.project-tech {
    margin-bottom: 22px;
}

.project-features {
    margin-bottom: 26px;
}

.project-features ul {
    list-style: none;
    display: grid;
    gap: 8px;
}

.project-features li {
    position: relative;
    padding-left: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.project-features li::before {
    content: "";
    position: absolute;
    left: 2px;
    top: 0.62em;
    width: 5px;
    height: 5px;
    transform: rotate(45deg);
    background: var(--accent-primary);
    opacity: 0.8;
}

.project-links {
    display: flex;
    gap: 22px;
    margin-top: auto;
    padding-top: 22px;
    border-top: 1px solid var(--border-light);
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent-primary);
}

.project-link:hover {
    color: var(--text-primary);
}

.opensource-section {
    border-top: 1px solid var(--hair);
}

.opensource-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
}

.opensource-card {
    padding: 34px;
    border-radius: 22px;
}

.opensource-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.opensource-header i {
    font-size: 1.6rem;
    color: var(--accent-primary);
}

.opensource-header h3 {
    font-size: 1.25rem;
}

.opensource-card > p {
    margin-bottom: 22px;
    line-height: 1.75;
}

.opensource-stats {
    display: flex;
    gap: 22px;
    margin-bottom: 24px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.opensource-stats i {
    margin-right: 6px;
    color: var(--accent-primary);
}

.opensource-link {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--accent-primary);
    background-image: linear-gradient(var(--accent-primary), var(--accent-primary));
    background-repeat: no-repeat;
    background-position: 0 100%;
    background-size: 0% 1px;
    padding-bottom: 3px;
    transition: background-size 0.5s var(--ease-out), color var(--transition-base);
}

.opensource-link:hover {
    color: var(--text-primary);
    background-size: 100% 1px;
}

/* ---------- Blog ---------- */
.blog-section {
    padding-top: 56px;
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
}

.blog-card {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border-radius: 24px;
}

.blog-card.featured {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1.15fr 1fr;
    border-radius: 30px;
}

.blog-card.featured .blog-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 52px 48px;
}

.blog-image {
    position: relative;
    height: 230px;
    overflow: hidden;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.blog-card.featured .blog-image {
    height: auto;
}

.blog-placeholder {
    font-size: 3rem;
    color: var(--accent-primary);
    opacity: 0.5;
}

.blog-content {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding: 30px 30px 28px;
}

.blog-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px 16px;
    margin-bottom: 14px;
    font-size: 0.84rem;
}

.blog-date {
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
}

.blog-category {
    color: var(--accent-primary);
    font-weight: 600;
}

.blog-title {
    font-size: 1.3rem;
    line-height: 1.32;
    margin-bottom: 14px;
}

.blog-card.featured .blog-title {
    font-size: clamp(1.6rem, 2.6vw, 2.2rem);
    font-weight: 330;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.blog-title a {
    color: var(--text-primary);
}

.blog-title a:hover {
    color: var(--accent-primary);
}

.blog-excerpt {
    margin-bottom: 22px;
    font-size: 0.96rem;
    line-height: 1.8;
}

.blog-readmore {
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--accent-primary);
}

.blog-readmore i {
    font-size: 0.8em;
    transition: transform 0.4s var(--ease-out);
}

.blog-readmore:hover {
    color: var(--text-primary);
}

.blog-readmore:hover i {
    transform: translateX(6px);
}

/* Photos: cropped to fill, portrait or landscape */
.blog-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    display: block;
    transition: transform 0.8s var(--ease-out), filter var(--transition-base);
}

.blog-card:hover .blog-image img {
    transform: scale(1.045);
}

.blog-image img.zoomable {
    cursor: zoom-in;
}

.blog-image img.zoomable:hover {
    filter: brightness(1.08);
}

.blog-image.gallery-2,
.blog-image.gallery-3 {
    display: grid;
    gap: 3px;
}

.blog-image.gallery-2 {
    grid-template-columns: 1fr 1fr;
}

.blog-image.gallery-3 {
    grid-template-columns: 1.3fr 1fr;
    grid-template-rows: 1fr 1fr;
}

.blog-image.gallery-3 img:first-child {
    grid-row: 1 / 3;
}

.blog-card.featured .blog-image.gallery-3 {
    min-height: 400px;
}

.blog-actions {
    margin-top: auto;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px 20px;
}

.blog-source-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.86rem;
    font-weight: 500;
    color: var(--text-muted);
}

.blog-source-link:hover {
    color: var(--accent-primary);
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 64px;
}

.page-btn {
    width: 46px;
    height: 46px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
    font-weight: 500;
    transition: transform var(--transition-base), border-color var(--transition-base), color var(--transition-base), background var(--transition-base);
}

.page-btn:hover {
    transform: translateY(-3px);
    border-color: var(--hair-strong);
    color: var(--accent-primary);
}

.page-btn.active {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: rgba(var(--accent-rgb), 0.1);
}

/* Newsletter */
.newsletter-section {
    padding-top: 40px;
}

.newsletter-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 48px;
    padding: 56px 60px;
    border-radius: 32px;
    overflow: hidden;
}

.newsletter-box::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background: radial-gradient(600px circle at 100% 0%, rgba(217, 191, 140, 0.12), transparent 60%);
}

.newsletter-content h3 {
    font-size: clamp(1.5rem, 2.6vw, 2.1rem);
    font-weight: 330;
    margin-bottom: 10px;
}

.newsletter-content p {
    max-width: 40ch;
}

.newsletter-form {
    display: flex;
    flex: none;
    width: min(440px, 100%);
    gap: 10px;
    padding: 6px;
    border-radius: 999px;
    border: 1px solid var(--hair);
    background: rgba(8, 10, 18, 0.55);
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.newsletter-form:focus-within {
    border-color: var(--hair-strong);
    box-shadow: 0 0 0 4px rgba(217, 191, 140, 0.08);
}

.newsletter-form input {
    flex: 1;
    min-width: 0;
    padding: 0 20px;
    font-family: var(--font-primary);
    font-size: 0.95rem;
    color: var(--text-primary);
    background: transparent;
    border: none;
    outline: none;
}

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

/* ---------- Lightbox ---------- */
.lightbox {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: 40px;
    background: rgba(5, 6, 11, 0.92);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
}

.lightbox.active {
    display: flex;
    animation: fade-in-fast 0.35s ease both;
}

@keyframes fade-in-fast {
    from { opacity: 0; }
    to   { opacity: 1; }
}

.lightbox-img {
    max-width: 100%;
    max-height: 100%;
    border-radius: 14px;
    border: 1px solid var(--hair);
    box-shadow: 0 30px 90px rgba(0, 0, 0, 0.6);
    cursor: zoom-out;
}

.lightbox.active .lightbox-img {
    animation: lightbox-pop 0.55s var(--ease-out) both;
}

@keyframes lightbox-pop {
    from { opacity: 0; transform: scale(0.95) translateY(12px); }
    to   { opacity: 1; transform: none; }
}

.lightbox-close {
    position: absolute;
    top: 24px;
    right: 28px;
    width: 46px;
    height: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--hair);
    border-radius: 50%;
    background: rgba(239, 233, 220, 0.06);
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
    transition: transform var(--transition-base), background var(--transition-base), border-color var(--transition-base);
}

.lightbox-close:hover {
    transform: rotate(90deg);
    border-color: var(--hair-strong);
    background: rgba(var(--accent-rgb), 0.14);
}

/* ---------- Notifications ---------- */
.notification {
    position: fixed;
    top: 92px;
    right: 24px;
    z-index: 10000;
    max-width: 380px;
    padding: 16px 22px;
    border-radius: 16px;
    border: 1px solid var(--hair-strong);
    background: rgba(13, 16, 25, 0.92);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    box-shadow: var(--shadow-lg);
    color: var(--text-primary);
    transform: translateX(32px);
    opacity: 0;
    transition: transform 0.6s var(--ease-out), opacity 0.4s ease;
}

.notification.show {
    transform: none;
    opacity: 1;
}

.notification-content {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 0.94rem;
}

.notification-content i {
    color: var(--accent-primary);
    font-size: 1.1rem;
}

.notification-error {
    border-color: rgba(226, 130, 130, 0.5);
}

.notification-error .notification-content i {
    color: #e28282;
}

/* ---------- Message sent page ---------- */
.thanks {
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.thanks-box {
    max-width: 520px;
    margin: 0 auto;
}

.thanks-icon {
    width: 88px;
    height: 88px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 36px;
    border-radius: 50%;
    border: 1px solid var(--hair-strong);
    background: rgba(var(--accent-rgb), 0.08);
    color: var(--accent-primary);
    font-size: 2.2rem;
    box-shadow: var(--glow);
    animation: pulse-ring 3.4s ease-in-out infinite;
}

@keyframes pulse-ring {
    0%, 100% { box-shadow: 0 0 0 0 rgba(217, 191, 140, 0.25), var(--glow); }
    50%      { box-shadow: 0 0 0 18px rgba(217, 191, 140, 0), var(--glow); }
}

.thanks-box .section-title {
    margin-bottom: 20px;
}

.thanks-box p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 36px;
}

/* ---------- Scrollbar ---------- */
html {
    scrollbar-width: thin;
    scrollbar-color: rgba(217, 191, 140, 0.35) var(--bg-primary);
}

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: rgba(217, 191, 140, 0.28);
    border-radius: 10px;
    border: 2px solid var(--bg-primary);
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(217, 191, 140, 0.5);
}

/* ---------- Card lift on hover (after reveal has settled) ---------- */
.project-card:hover,
.cert-card:hover,
.blog-card:hover,
.opensource-card:hover,
.overview-card:hover {
    transform: translateY(-6px) !important;
    box-shadow: var(--shadow-md);
}

.publication-card:hover,
.research-project:hover,
.info-card:hover {
    box-shadow: var(--shadow-md);
}

.blog-card.featured:hover {
    transform: translateY(-4px) !important;
}

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
    .focus-grid,
    .overview-grid,
    .skills-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .featured-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .contact-grid {
        gap: 56px;
    }

    .bio-grid {
        gap: 56px;
    }
}

@media (max-width: 900px) {
    :root {
        --section-padding: 88px;
    }

    .hamburger {
        display: flex;
    }

    .nav-container {
        padding: 8px 10px 8px 22px;
    }

    .nav-menu {
        position: absolute;
        top: calc(100% + 10px);
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 2px;
        padding: 12px;
        border-radius: 26px;
        border: 1px solid var(--hair);
        background: rgba(9, 11, 19, 0.94);
        -webkit-backdrop-filter: blur(22px);
        backdrop-filter: blur(22px);
        box-shadow: var(--shadow-lg);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px) scale(0.98);
        transform-origin: top center;
        transition: opacity 0.35s ease, transform 0.5s var(--ease-out), visibility 0s linear 0.35s;
    }

    .nav-menu.active {
        opacity: 1;
        visibility: visible;
        transform: none;
        transition-delay: 0s;
    }

    .nav-link {
        padding: 14px 20px;
        font-size: 1rem;
    }

    .contact-grid,
    .bio-grid {
        grid-template-columns: 1fr;
    }

    .bio-sidebar {
        order: -1;
    }

    .profile-photo-card {
        max-width: 440px;
    }

    .blog-card.featured {
        grid-template-columns: 1fr;
    }

    .blog-card.featured .blog-image.gallery-3 {
        min-height: 300px;
    }

    .blog-card.featured .blog-content {
        padding: 34px 30px;
    }

    .newsletter-box {
        flex-direction: column;
        align-items: flex-start;
        padding: 40px 32px;
    }

    .newsletter-form {
        width: 100%;
    }

    .publication-card {
        grid-template-columns: 1fr;
        padding: 36px 30px;
    }

    .pub-number {
        font-size: 2.6rem;
        padding-left: 0;
        margin-bottom: 4px;
    }

    .page-header {
        padding: 150px 0 56px;
    }

    .research-project {
        padding: 38px 28px;
    }
}

@media (max-width: 700px) {
    .container,
    .hero-container {
        padding: 0 22px;
    }

    .featured-grid,
    .focus-grid,
    .overview-grid,
    .skills-grid,
    .cert-grid,
    .opensource-grid {
        grid-template-columns: 1fr;
    }

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

    .hero {
        padding: 130px 0 100px;
    }

    .hero-stats {
        margin: 40px 0 36px;
    }

    .stat-item {
        min-width: 0;
        padding: 20px 14px 20px 0;
        margin-right: 14px;
    }

    .update-item {
        grid-template-columns: 1fr;
        gap: 14px;
        padding: 30px 0;
    }

    .update-date {
        flex-direction: row;
        align-items: baseline;
        gap: 14px;
    }

    .date-day {
        font-size: 1.6rem;
    }

    .contact-form-wrapper {
        padding: 30px 24px;
    }

    .timeline {
        padding-left: 34px;
    }

    .timeline-marker {
        left: -34px;
    }

    .timeline-content {
        padding: 24px 22px;
    }

    .timeline-courses ul {
        grid-template-columns: 1fr;
    }

    .blog-image.gallery-3,
    .blog-card.featured .blog-image.gallery-3 {
        min-height: 260px;
    }

    .footer-content {
        flex-direction: column;
    }

    .lightbox {
        padding: 16px;
    }

    .lightbox-close {
        top: 12px;
        right: 12px;
    }

    .notification {
        left: 16px;
        right: 16px;
        max-width: none;
    }
}

@media (max-width: 420px) {
    .hero-actions .btn {
        flex: 1 1 100%;
    }

    .stat-label {
        font-size: 0.8rem;
    }
}

/* Touch devices have no hover: skip lift and spotlight work */
@media (hover: none) {
    .cursor-glow {
        display: none;
    }
}

/* Respect reduced motion: content appears instantly, ambient loops stop */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        animation-delay: 0ms !important;
        transition-duration: 0.001ms !important;
        transition-delay: 0ms !important;
        scroll-behavior: auto !important;
    }

    .js .featured-card,
    .js .focus-card,
    .js .update-item,
    .js .publication-card,
    .js .project-card,
    .js .blog-card,
    .js .cert-card,
    .js .skill-category,
    .js .timeline-item,
    .js .overview-card,
    .js .opensource-card,
    .js .info-card,
    .js .profile-photo-card,
    .js .research-project,
    .js .newsletter-box,
    .js .contact-form-wrapper,
    .js .section-header,
    .js .container > .section-title,
    .js .cta-content,
    .js .hero-content > *,
    .js .page-title,
    .js .page-subtitle {
        opacity: 1 !important;
        transform: none !important;
        filter: none !important;
    }

    .cursor-glow,
    .hero-canvas {
        display: none;
    }
}