:root {
    --bg: #0d1117;
    --surface: #151b24;
    --surface-2: #1c2431;
    --border: #263042;
    --text: #e6edf3;
    --muted: #8b98a9;
    --accent: #3ddc97;
    --accent-ink: #06281a;
    --radius: 14px;
    --mono: ui-monospace, "JetBrains Mono", "Cascadia Code", Consolas, Menlo, monospace;
    --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
}

@media (prefers-color-scheme: light) {
    :root {
        --bg: #f7f8fa;
        --surface: #ffffff;
        --surface-2: #eef1f5;
        --border: #dde2ea;
        --text: #131a24;
        --muted: #566275;
        --accent: #0a8f5b;
        --accent-ink: #ffffff;
    }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a:focus-visible, .btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

.wrap { width: min(1080px, 100% - 40px); margin-inline: auto; }
.muted { color: var(--muted); }
.accent { color: var(--accent); }

/* Topbar */
.topbar {
    position: sticky; top: 0; z-index: 10;
    display: flex; align-items: center; justify-content: space-between;
    padding: 14px max(20px, calc((100% - 1080px) / 2));
    background: color-mix(in srgb, var(--bg) 85%, transparent);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}
.brand { font-family: var(--mono); font-weight: 700; letter-spacing: .02em; }
.brand-mark { color: var(--accent); }
.nav { display: flex; align-items: center; gap: 22px; font-size: .95rem; color: var(--muted); }
.nav a:hover { color: var(--text); }
.nav-cta {
    color: var(--accent) !important;
    border: 1px solid var(--accent);
    padding: 6px 14px; border-radius: 999px;
}

/* Hero */
.hero { padding: 96px 0 64px; }
.eyebrow { font-family: var(--mono); font-size: .85rem; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); margin: 0 0 14px; }
h1 { font-size: clamp(2.4rem, 6vw, 4rem); line-height: 1.1; margin: 0 0 18px; letter-spacing: -.02em; }
.lead { font-size: clamp(1.05rem, 2vw, 1.3rem); color: var(--muted); max-width: 640px; margin: 0 0 30px; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
    display: inline-block; padding: 11px 22px; border-radius: 999px;
    border: 1px solid var(--border); font-weight: 600; transition: transform .15s, border-color .15s;
}
.btn:hover { transform: translateY(-2px); border-color: var(--accent); }
.btn-primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }

.stats { display: flex; flex-wrap: wrap; gap: 14px; margin: 56px 0 0; }
.stat { flex: 1 1 180px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; }
.stat dt { font-family: var(--mono); font-size: 2rem; font-weight: 700; color: var(--accent); }
.stat dd { margin: 2px 0 0; color: var(--muted); font-size: .9rem; }

/* Sections */
.section { padding: 56px 0; border-top: 1px solid var(--border); }
.section-title { font-size: 1.7rem; margin: 0 0 28px; display: flex; align-items: baseline; gap: 12px; }
.idx { font-family: var(--mono); font-size: .9rem; color: var(--accent); }

.about { display: grid; grid-template-columns: 1.4fr 1fr; gap: 36px; }
.about-text p { margin: 0 0 14px; color: var(--muted); font-size: 1.05rem; }
.facts { list-style: none; margin: 0; padding: 0; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.facts li { padding: 14px 18px; border-bottom: 1px solid var(--border); display: flex; flex-direction: column; }
.facts li:last-child { border-bottom: 0; }
.facts span { font-family: var(--mono); font-size: .75rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(310px, 1fr)); gap: 18px; }
.cards-2 { grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); }
.card {
    display: flex; flex-direction: column; gap: 6px;
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 22px; transition: transform .18s, border-color .18s;
}
.card:hover { transform: translateY(-4px); border-color: var(--accent); }
.card h3 { margin: 0; font-size: 1.2rem; }
.card p { margin: 0; }
.card-cat { font-family: var(--mono); font-size: .75rem; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); }
.card-more { margin-top: auto; padding-top: 14px; color: var(--accent); font-weight: 600; font-size: .92rem; }

.tags { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 12px 0 0; }
.tags li { font-family: var(--mono); font-size: .76rem; padding: 4px 10px; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--border); color: var(--muted); }

/* Skills */
.skills { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }
.skill-group { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.skill-group h3 { margin: 0; font-size: 1rem; }

/* Writing */
.writing { background: var(--surface); border: 1px solid var(--border); border-left: 4px solid var(--accent); border-radius: var(--radius); padding: 26px; max-width: 760px; }
.writing h3 { font-size: 1.5rem; margin: 4px 0 10px; }
.writing p { color: var(--muted); }

/* Project page */
.project { padding: 56px 0 24px; }
.back { display: inline-block; margin-bottom: 28px; color: var(--muted); font-size: .92rem; }
.back:hover { color: var(--accent); }
.project-body { display: grid; grid-template-columns: 1.6fr 1fr; gap: 36px; margin-top: 20px; }
.project-body p { color: var(--muted); font-size: 1.05rem; }
.sub { font-size: 1.1rem; margin: 26px 0 10px; }
.sub:first-child { margin-top: 0; }
.bullets { padding-left: 20px; color: var(--muted); }
.bullets li { margin-bottom: 8px; }
.bullets li::marker { color: var(--accent); }
.panel { align-self: start; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.more-title { margin-top: 56px; }

/* Footer */
.footer { margin-top: 64px; padding: 48px 0 28px; border-top: 1px solid var(--border); background: var(--surface); }
.footer-grid { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 28px; }
.footer-title { margin: 0 0 6px; font-size: 1.5rem; }
.contact-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; font-family: var(--mono); }
.contact-list a { color: var(--accent); }
.contact-list a:hover { text-decoration: underline; }
.copyright { margin-top: 36px; color: var(--muted); font-size: .85rem; }

@media (max-width: 760px) {
    .nav a:not(.nav-cta) { display: none; }
    .about, .project-body { grid-template-columns: 1fr; }
    .hero { padding-top: 64px; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .card, .btn { transition: none; }
}