/* ===== Design tokens ===== */
:root {
    --bg: #fbfaf7;
    --bg-soft: #f3f1ec;
    --surface: #ffffff;
    --text: #1d1b26;
    --muted: #6b6878;
    --border: #e7e4dc;
    --shadow: 0 1px 2px rgba(20, 16, 40, .04), 0 8px 24px rgba(20, 16, 40, .06);

    --pink: #ec4899;
    --blue: #3b82f6;
    --violet: #8b5cf6;
    --orange: #f97316;
    --green: #10b981;
    --teal: #06b6d4;
    --yellow: #facc15;

    --gradient: linear-gradient(100deg, var(--pink), var(--violet) 45%, var(--blue));
    --radius: 16px;
    --max: 1080px;
    --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg: #12111a;
        --bg-soft: #1a1925;
        --surface: #1c1b27;
        --text: #ece9f5;
        --muted: #9d99ad;
        --border: #2c2a3a;
        --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
    }
}

:root[data-theme="dark"] {
    --bg: #12111a;
    --bg-soft: #1a1925;
    --surface: #1c1b27;
    --text: #ece9f5;
    --muted: #9d99ad;
    --border: #2c2a3a;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
}

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

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
    font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
    font-size: 17px;
    line-height: 1.65;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    transition: background .25s, color .25s;
}

/* Soft colorful glow behind the page */
body::before {
    content: "";
    position: fixed;
    top: -20vh;
    right: -20vw;
    width: 70vw;
    height: 70vh;
    background:
        radial-gradient(closest-side, rgba(236, 72, 153, .16), transparent 70%),
        radial-gradient(closest-side at 30% 70%, rgba(59, 130, 246, .14), transparent 70%);
    filter: blur(40px);
    z-index: -1;
    pointer-events: none;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
code {
    font-family: var(--mono);
    font-size: .85em;
    background: var(--bg-soft);
    border: 1px solid var(--border);
    padding: .1em .4em;
    border-radius: 6px;
}

.container {
    width: 100%;
    max-width: var(--max);
    margin: 0 auto;
    padding: 0 24px;
}

.muted { color: var(--muted); }

/* ===== Navbar ===== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 50;
    background: color-mix(in srgb, var(--bg) 80%, transparent);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    max-width: var(--max);
    margin: 0 auto;
    padding: 12px 24px;
    display: flex;
    align-items: center;
    gap: 24px;
}

.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }

.brand-mark {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    border-radius: 10px;
    background: var(--gradient);
    color: #fff;
    font-family: var(--mono);
    font-size: 14px;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 4px;
    margin-left: auto;
}

.nav-links a {
    display: block;
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
    color: var(--muted);
    transition: color .15s, background .15s;
}

.nav-links a:hover { color: var(--text); background: var(--bg-soft); }

.theme-toggle {
    border: 1px solid var(--border);
    background: var(--surface);
    border-radius: 10px;
    width: 38px;
    height: 38px;
    flex-shrink: 0;
    cursor: pointer;
    font-size: 16px;
}

.theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: inline; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .theme-toggle .icon-sun { display: inline; }
    :root:not([data-theme="light"]) .theme-toggle .icon-moon { display: none; }
}

/* ===== Hero ===== */
.hero {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 48px;
    align-items: center;
    padding-top: 80px;
    padding-bottom: 64px;
}

.eyebrow {
    font-family: var(--mono);
    font-size: 15px;
    color: var(--pink);
    margin-bottom: 12px;
}

.hero h1 {
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    line-height: 1.1;
    letter-spacing: -0.03em;
    font-weight: 800;
    margin-bottom: 24px;
}

.gradient-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.lead { font-size: 1.1rem; margin-bottom: 14px; max-width: 38em; }

.tag {
    display: inline-block;
    padding: 0 8px;
    border-radius: 6px;
    font-weight: 600;
}
.tag-pink  { background: color-mix(in srgb, var(--pink) 15%, transparent);  color: var(--pink); }
.tag-blue  { background: color-mix(in srgb, var(--blue) 15%, transparent);  color: var(--blue); }
.tag-green { background: color-mix(in srgb, var(--green) 15%, transparent); color: var(--green); }

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 24px; }
.hero-actions.center { justify-content: center; margin-bottom: 0; }

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    border-radius: 999px;
    font-weight: 600;
    font-size: 15px;
    transition: transform .15s, box-shadow .15s, background .15s;
}
.btn:hover { transform: translateY(-2px); }

.btn-primary {
    background: var(--gradient);
    color: #fff;
    box-shadow: 0 6px 20px rgba(139, 92, 246, .35);
}
.btn-ghost {
    border: 1px solid var(--border);
    background: var(--surface);
}
.btn-ghost:hover { box-shadow: var(--shadow); }
.btn-light { background: #fff; color: #1d1b26; }
.btn-outline-light { border: 1.5px solid rgba(255, 255, 255, .7); color: #fff; }

.socials { display: flex; flex-wrap: wrap; gap: 20px; }
.socials a {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    color: var(--muted);
    transition: color .15s;
}
.socials a:hover { color: var(--violet); }
.socials svg { width: 18px; height: 18px; }

.hero-photo { position: relative; justify-self: center; }

.photo-ring {
    width: min(320px, 70vw);
    aspect-ratio: 1;
    padding: 6px;
    border-radius: 42% 58% 55% 45% / 48% 42% 58% 52%;
    background: conic-gradient(from 200deg, var(--pink), var(--orange), var(--yellow), var(--green), var(--blue), var(--violet), var(--pink));
    animation: morph 12s ease-in-out infinite;
}
.photo-ring img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: inherit;
    border: 5px solid var(--bg);
}

@keyframes morph {
    0%, 100% { border-radius: 42% 58% 55% 45% / 48% 42% 58% 52%; }
    50%      { border-radius: 55% 45% 42% 58% / 58% 52% 48% 42%; }
}

.floating-chip {
    position: absolute;
    padding: 6px 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 999px;
    box-shadow: var(--shadow);
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
    animation: float 6s ease-in-out infinite;
}
.chip-1 { top: 6%;  left: -14%; }
.chip-2 { top: 44%; right: -16%; animation-delay: -2s; }
.chip-3 { bottom: 4%; left: -4%; animation-delay: -4s; }

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-10px); }
}

/* ===== Sections ===== */
.section { padding-top: 56px; padding-bottom: 56px; }

.section-head { margin-bottom: 32px; }
.section-head h2 {
    font-size: clamp(1.7rem, 3.5vw, 2.2rem);
    letter-spacing: -0.02em;
    font-weight: 800;
    display: flex;
    align-items: baseline;
    gap: 12px;
}
.section-num {
    font-family: var(--mono);
    font-size: .55em;
    font-weight: 600;
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.subhead {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 40px 0 16px;
}

/* Fade-in on scroll */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ===== Accent helper ===== */
.accent-pink   { --accent: var(--pink); }
.accent-blue   { --accent: var(--blue); }
.accent-violet { --accent: var(--violet); }
.accent-orange { --accent: var(--orange); }
.accent-green  { --accent: var(--green); }
.accent-teal   { --accent: var(--teal); }

/* ===== Project cards ===== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(300px, 100%), 1fr));
    gap: 20px;
}

.card {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: 24px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: transform .2s, box-shadow .2s, border-color .2s;
}
.card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--accent);
}
.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px color-mix(in srgb, var(--accent) 22%, transparent);
    border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
}

.card-icon {
    width: 48px;
    height: 48px;
    display: grid;
    place-items: center;
    font-size: 26px;
    border-radius: 12px;
    background: color-mix(in srgb, var(--accent) 14%, transparent);
    margin-bottom: 16px;
}
.card-icon img { width: 30px; height: 30px; object-fit: contain; }

.card h3 { font-size: 1.15rem; margin-bottom: 8px; letter-spacing: -0.01em; }
.card h3 a:hover { color: var(--accent); }
.card p { color: var(--muted); font-size: 15px; flex: 1; }

.card-tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 16px 0; }
.card-tags span {
    font-family: var(--mono);
    font-size: 12px;
    padding: 2px 8px;
    border-radius: 6px;
    background: var(--bg-soft);
    color: var(--muted);
}

.card-links { display: flex; gap: 16px; font-size: 14px; font-weight: 600; }
.card-links a { color: var(--accent); }
.card-links a:hover { text-decoration: underline; }

.mini-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(300px, 100%), 1fr));
    gap: 16px;
}
.mini-card {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 18px 20px;
    border-radius: var(--radius);
    border: 1px dashed var(--border);
    transition: border-color .2s, background .2s;
}
.mini-card:hover { border-color: var(--violet); background: var(--surface); }
.mini-emoji { font-size: 28px; line-height: 1; }
.mini-card h4 { margin-bottom: 4px; }
.mini-card p { color: var(--muted); font-size: 15px; }

/* ===== Timeline ===== */
.timeline { list-style: none; position: relative; }
.timeline::before {
    content: "";
    position: absolute;
    left: 130px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: linear-gradient(var(--pink), var(--blue), var(--violet), var(--orange), var(--green));
    border-radius: 2px;
    opacity: .6;
}

.tl-item {
    display: grid;
    grid-template-columns: 130px 1fr;
    gap: 32px;
    padding-bottom: 36px;
    position: relative;
}
.tl-item::before {
    content: "";
    position: absolute;
    left: 124px;
    top: 7px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--dot);
    box-shadow: 0 0 0 4px var(--bg), 0 0 0 6px color-mix(in srgb, var(--dot) 35%, transparent);
}

.tl-date {
    font-family: var(--mono);
    font-size: 14px;
    color: var(--muted);
    padding-top: 2px;
    text-align: right;
    padding-right: 16px;
}

.tl-body h3 { font-size: 1.1rem; letter-spacing: -0.01em; }
.tl-org { color: var(--dot); font-weight: 600; margin-bottom: 8px; }
.tl-body ul { padding-left: 18px; color: var(--muted); font-size: 15.5px; }
.tl-body li { margin-bottom: 4px; }

/* ===== Academics list ===== */
.list-block .subhead { margin-top: 0; }
.list-block + .list-block { margin-top: 36px; }

.post-list { list-style: none; border-top: 1px solid var(--border); }
.post-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding: 14px 4px;
    border-bottom: 1px solid var(--border);
}
.post-list a { font-weight: 600; transition: color .15s; }
.post-list a:hover { color: var(--violet); }

.pill {
    font-family: var(--mono);
    font-size: 12px;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 999px;
    white-space: nowrap;
}
.pill-pink   { background: color-mix(in srgb, var(--pink) 15%, transparent);   color: var(--pink); }
.pill-blue   { background: color-mix(in srgb, var(--blue) 15%, transparent);   color: var(--blue); }
.pill-violet { background: color-mix(in srgb, var(--violet) 15%, transparent); color: var(--violet); }
.pill-orange { background: color-mix(in srgb, var(--orange) 15%, transparent); color: var(--orange); }
.pill-green  { background: color-mix(in srgb, var(--green) 15%, transparent);  color: var(--green); }

/* ===== Now / interests ===== */
.todo-badge {
    display: inline-block;
    margin-left: 8px;
    font-family: var(--mono);
    font-size: 12px;
    padding: 2px 8px;
    border-radius: 6px;
    background: color-mix(in srgb, var(--yellow) 30%, transparent);
    color: var(--text);
}

.interest-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(220px, 100%), 1fr));
    gap: 16px;
}
.interest {
    padding: 20px;
    border-radius: var(--radius);
    background: color-mix(in srgb, var(--accent) 9%, var(--surface));
    border: 1px solid color-mix(in srgb, var(--accent) 25%, var(--border));
    transition: transform .2s;
}
.interest { display: flex; flex-direction: column; }
.interest:hover {
    transform: rotate(-1deg) translateY(-3px);
    box-shadow: 0 10px 28px color-mix(in srgb, var(--accent) 22%, transparent);
}
.interest-emoji { font-size: 28px; margin-bottom: 8px; }
.interest h4 { margin-bottom: 4px; }
.interest p { font-size: 15px; color: var(--muted); flex: 1; }
.placeholder { font-style: italic; }
.interest-more {
    margin-top: 12px;
    font-size: 14px;
    font-weight: 600;
    color: var(--accent);
}

/* ===== Blog post pages ===== */
.post { max-width: 760px; padding-top: 48px; padding-bottom: 32px; }

.back-link {
    display: inline-block;
    font-size: 14px;
    font-weight: 600;
    color: var(--muted);
    margin-bottom: 40px;
    transition: color .15s;
}
.back-link:hover { color: var(--accent); }

.post-header {
    padding-bottom: 32px;
    margin-bottom: 40px;
    border-bottom: 1px solid var(--border);
}
.post-emoji {
    width: 72px;
    height: 72px;
    display: grid;
    place-items: center;
    font-size: 38px;
    border-radius: 20px;
    background: color-mix(in srgb, var(--accent) 15%, transparent);
    border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
    margin-bottom: 24px;
}
.post-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--mono);
    font-size: 13px;
    color: var(--accent);
    margin-bottom: 10px;
}
.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 22%, transparent);
    animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50%      { opacity: .35; }
}
.post-header h1 {
    font-size: clamp(2.2rem, 6vw, 3.2rem);
    line-height: 1.1;
    letter-spacing: -0.03em;
    font-weight: 800;
    margin-bottom: 12px;
}
.post-blurb { font-size: 1.15rem; color: var(--muted); }
.post-header .card-tags { margin-bottom: 0; }

.tbc {
    padding: 40px 32px;
    border-radius: var(--radius);
    border: 1px dashed color-mix(in srgb, var(--accent) 45%, var(--border));
    background: color-mix(in srgb, var(--accent) 5%, var(--surface));
    text-align: center;
}
.tbc-lines { display: grid; gap: 12px; margin-bottom: 32px; }
.tbc-lines span {
    height: 12px;
    border-radius: 6px;
    background: linear-gradient(90deg,
        color-mix(in srgb, var(--accent) 10%, var(--bg-soft)),
        color-mix(in srgb, var(--accent) 25%, var(--bg-soft)),
        color-mix(in srgb, var(--accent) 10%, var(--bg-soft)));
    background-size: 200% 100%;
    animation: shimmer 2.4s linear infinite;
}
@keyframes shimmer {
    from { background-position: 200% 0; }
    to   { background-position: -200% 0; }
}
.tbc-text {
    font-size: clamp(1.6rem, 4vw, 2rem);
    font-weight: 800;
    font-style: italic;
    letter-spacing: -0.02em;
    color: var(--accent);
    margin-bottom: 8px;
}
.tbc .muted { max-width: 30em; margin: 0 auto; font-size: 15px; }
.tbc a { color: var(--accent); font-weight: 600; }
.tbc a:hover { text-decoration: underline; }

.post-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 48px;
}
.post-nav-link {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 16px 20px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    font-size: 15px;
    transition: border-color .2s, transform .2s;
}
.post-nav-link span { font-size: 13px; }
.post-nav-link:hover { border-color: var(--accent); transform: translateY(-2px); }
.post-nav-link.next { text-align: right; }

/* ===== CTA ===== */
.cta {
    text-align: center;
    padding: 56px 24px;
    border-radius: 24px;
    color: #fff;
    background:
        radial-gradient(circle at 15% 20%, rgba(250, 204, 21, .45), transparent 40%),
        radial-gradient(circle at 85% 80%, rgba(6, 182, 212, .5), transparent 45%),
        var(--gradient);
    box-shadow: 0 20px 50px rgba(139, 92, 246, .3);
}
.cta h2 { font-size: clamp(1.6rem, 3.5vw, 2.2rem); letter-spacing: -0.02em; margin-bottom: 8px; }
.cta p { opacity: .92; margin-bottom: 24px; }

/* ===== Footer ===== */
.footer {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 12px;
    padding-top: 32px;
    padding-bottom: 40px;
    margin-top: 24px;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: 14px;
}
.footer-links { display: flex; gap: 20px; }
.footer-links a:hover { color: var(--text); }

/* ===== Responsive ===== */
@media (max-width: 860px) {
    .hero { grid-template-columns: 1fr; padding-top: 48px; gap: 40px; }
    .hero-photo { order: -1; }
    .chip-1 { left: -8%; }
    .chip-2 { right: -10%; }
}

@media (max-width: 640px) {
    .container, .nav-inner { padding-left: 16px; padding-right: 16px; }
    .brand-name { display: none; }
    .nav-inner { gap: 8px; }
    .nav-links { gap: 0; }
    .nav-links a { padding: 6px 8px; font-size: 14px; }

    .timeline::before { left: 6px; }
    .tl-item { grid-template-columns: 1fr; gap: 4px; padding-left: 32px; }
    .tl-item::before { left: 0; }
    .tl-date { text-align: left; padding-right: 0; }

    .post-list li { flex-direction: column; align-items: flex-start; gap: 6px; }
    .floating-chip { font-size: 12px; }
    .chip-1 { left: -4%; }
    .chip-2 { right: -6%; }

    .post-nav { grid-template-columns: 1fr; }
    .tbc { padding: 32px 20px; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation: none !important; transition: none !important; }
    html { scroll-behavior: auto; }
    .reveal { opacity: 1; transform: none; }
}