/* Design tokens: light by default, dark from the OS setting or the toggle. */
:root {
  --bg: #ffffff;
  --bg-soft: #f6f8fa;
  --card: #ffffff;
  --text: #1f2328;
  --muted: #59636e;
  --border: #d1d9e0;
  --accent: #0969da;
  --accent-2: #8250df;
  --merged: #1a7f37;
  --merged-bg: #dafbe1;
  --review: #9a6700;
  --review-bg: #fff8c5;
  --code-bg: #eff2f5;
  --shadow: 0 1px 2px rgba(31, 35, 40, 0.04), 0 8px 24px rgba(66, 74, 83, 0.08);
  --radius: 14px;
  --wrap: 1080px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0d1117;
    --bg-soft: #151b23;
    --card: #151b23;
    --text: #f0f6fc;
    --muted: #9198a1;
    --border: #3d444d;
    --accent: #4493f8;
    --accent-2: #a371f7;
    --merged: #3fb950;
    --merged-bg: rgba(46, 160, 67, 0.15);
    --review: #d29922;
    --review-bg: rgba(187, 128, 9, 0.15);
    --code-bg: #262c36;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.25);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #0d1117;
  --bg-soft: #151b23;
  --card: #151b23;
  --text: #f0f6fc;
  --muted: #9198a1;
  --border: #3d444d;
  --accent: #4493f8;
  --accent-2: #a371f7;
  --merged: #3fb950;
  --merged-bg: rgba(46, 160, 67, 0.15);
  --review: #d29922;
  --review-bg: rgba(187, 128, 9, 0.15);
  --code-bg: #262c36;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.25);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 76px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 var(--font);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

code {
  font: 0.86em var(--mono);
  background: var(--code-bg);
  padding: 0.12em 0.4em;
  border-radius: 6px;
  overflow-wrap: anywhere;
}

h1, h2, h3 { line-height: 1.2; margin: 0; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.5rem, 1.1rem + 1.4vw, 2rem); }
h3 { font-size: 1.05rem; letter-spacing: -0.01em; }

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: 16px; }
@media (min-width: 640px) { .wrap { padding-inline: 24px; } }

.skip {
  position: absolute; left: -999px; top: 8px; z-index: 100;
  background: var(--card); color: var(--text); padding: 8px 14px; border-radius: 8px; border: 1px solid var(--border);
}
.skip:focus { left: 8px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid color-mix(in srgb, var(--border) 60%, transparent);
}
.nav { display: flex; align-items: center; gap: 16px; height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); font-weight: 650; }
.brand:hover { text-decoration: none; }
.brand-mark {
  display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; font-size: 0.8rem; letter-spacing: 0.02em;
}
.nav-links { display: flex; gap: 22px; list-style: none; margin: 0 0 0 auto; padding: 0; font-size: 0.94rem; }
.nav-links a { color: var(--muted); }
.nav-links a:hover { color: var(--text); text-decoration: none; }
@media (max-width: 700px) { .nav-links { display: none; } .theme-toggle { margin-left: auto; } }

.theme-toggle {
  display: inline-grid; place-items: center; width: 36px; height: 36px; padding: 0;
  border: 1px solid var(--border); border-radius: 10px; background: var(--card); color: var(--text); cursor: pointer;
}
.theme-toggle svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; }
.theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-sun { display: none; }
  :root:not([data-theme="light"]) .theme-toggle .icon-moon { display: block; }
}

/* Hero */
.hero {
  display: grid; gap: 40px; align-items: center;
  padding-top: clamp(40px, 8vw, 88px); padding-bottom: 32px;
  grid-template-columns: 1fr;
}
@media (min-width: 860px) { .hero { grid-template-columns: 1.5fr 1fr; } }
.status {
  display: inline-flex; align-items: center; gap: 8px; margin: 0 0 18px;
  font-size: 0.9rem; color: var(--muted);
  border: 1px solid var(--border); border-radius: 999px; padding: 5px 12px 5px 10px; background: var(--bg-soft);
}
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--merged); box-shadow: 0 0 0 4px var(--merged-bg); }
h1 { font-size: clamp(2.6rem, 1.6rem + 4.4vw, 4.2rem); font-weight: 750; letter-spacing: -0.035em; }
.lead { font-size: clamp(1.06rem, 1rem + 0.35vw, 1.22rem); color: var(--muted); max-width: 58ch; margin: 16px 0 0; }
.lead strong { color: var(--text); font-weight: 600; }

.portrait { justify-self: center; order: -1; }
@media (min-width: 860px) { .portrait { order: 0; justify-self: end; } }
.portrait img {
  display: block; width: clamp(180px, 34vw, 300px); height: auto; aspect-ratio: 1; object-fit: cover;
  border-radius: 50%; padding: 5px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: var(--shadow);
}

/* Buttons */
.cta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; min-height: 42px; padding: 0 16px;
  border: 1px solid var(--border); border-radius: 10px; background: var(--card); color: var(--text);
  font-weight: 600; font-size: 0.95rem; transition: border-color 0.15s, transform 0.15s;
}
.btn:hover { text-decoration: none; border-color: var(--accent); transform: translateY(-1px); }
.btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linejoin: round; }
.btn svg.fill { fill: currentColor; stroke: none; }
.btn-primary { background: var(--text); color: var(--bg); border-color: var(--text); }
.btn-primary:hover { border-color: var(--text); }
@media (prefers-reduced-motion: reduce) { .btn { transition: none; } .btn:hover { transform: none; } }

/* Stats */
.stats {
  display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  padding-top: 8px; padding-bottom: 8px;
}
.stat {
  border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg-soft);
  padding: 18px 18px 16px; display: grid; gap: 4px;
}
.stat strong {
  font-size: 2rem; line-height: 1.1; letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stat small { font-size: 0.5em; vertical-align: 0.8em; margin-left: 1px; }
.stat span { color: var(--muted); font-size: 0.92rem; line-height: 1.45; }

/* Sections */
.section { padding-top: clamp(56px, 8vw, 96px); }
.eyebrow {
  margin: 0 0 8px; font-size: 0.8rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--accent);
}
.section-lead { color: var(--muted); max-width: 68ch; margin: 12px 0 0; font-size: 1.04rem; }

.grid { display: grid; gap: 14px; margin-top: 28px; }
.features { grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); }
.highlights { grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); }
.projects { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }

.card {
  border: 1px solid var(--border); border-radius: var(--radius); background: var(--card);
  padding: 20px; box-shadow: var(--shadow);
}
.card h3 { margin-bottom: 8px; }
.card p { margin: 0; color: var(--muted); font-size: 0.96rem; }
.card p strong { color: var(--text); }
.card-kicker { font-weight: 650; margin-bottom: 8px !important; }
.project ul:not(.chips) { margin: 12px 0 0; padding-left: 18px; color: var(--muted); font-size: 0.94rem; }
.project li + li { margin-top: 4px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 22px 0 0; }
.chips li {
  font-size: 0.84rem; font-weight: 550; padding: 4px 10px; border-radius: 999px;
  background: var(--bg-soft); border: 1px solid var(--border); color: var(--text);
}
.project .chips { margin-top: 16px; }

/* Screenshot frame */
.shot {
  margin: 28px 0 0; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
  background: var(--bg-soft); box-shadow: var(--shadow);
}
.shot-bar { display: flex; align-items: center; gap: 6px; padding: 10px 14px; border-bottom: 1px solid var(--border); }
.shot-bar span { width: 10px; height: 10px; border-radius: 50%; background: var(--border); }
.shot-bar em { margin-left: 10px; font-style: normal; font-size: 0.8rem; color: var(--muted); }
.shot img { display: block; width: 100%; height: auto; }

/* Open-source list (generated) */
.oss { margin-top: 28px; display: grid; gap: 24px; }
.oss h3 { display: flex; align-items: baseline; gap: 10px; font-size: 1rem; }
.oss h3 .count { color: var(--muted); font-weight: 500; font-size: 0.9rem; }
.pr-list { list-style: none; margin: 12px 0 0; padding: 0; border: 1px solid var(--border); border-radius: var(--radius); background: var(--card); overflow: hidden; }
.pr { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 4px 16px; padding: 14px 18px; }
.pr + .pr { border-top: 1px solid var(--border); }
.pr-repo { font-size: 0.86rem; color: var(--muted); }
.pr-repo a { color: var(--muted); font-weight: 600; }
.pr-title { grid-column: 1; font-weight: 550; }
.pr-title a { color: var(--text); }
.pill {
  grid-column: 2; grid-row: 1 / span 2; align-self: center; white-space: nowrap;
  font-size: 0.78rem; font-weight: 650; padding: 3px 10px; border-radius: 999px;
}
.pill.merged { color: var(--merged); background: var(--merged-bg); }
.pill.review { color: var(--review); background: var(--review-bg); }
.oss-note { margin: 0; color: var(--muted); font-size: 0.85rem; }

/* Achievements and skills */
.two-col { display: grid; gap: 48px; grid-template-columns: 1fr; }
@media (min-width: 860px) { .two-col { grid-template-columns: 1fr 1fr; } }
.timeline { list-style: none; margin: 22px 0 0; padding: 0; border-left: 2px solid var(--border); }
.timeline li { position: relative; padding: 0 0 18px 20px; color: var(--muted); }
.timeline li::before {
  content: ""; position: absolute; left: -7px; top: 8px; width: 12px; height: 12px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); border: 2px solid var(--bg);
}
.timeline strong { color: var(--text); }
.skills { display: grid; grid-template-columns: max-content 1fr; gap: 10px 18px; margin: 22px 0 0; }
.skills dt { font-weight: 650; }
.skills dd { margin: 0; color: var(--muted); }
@media (max-width: 420px) { .skills { grid-template-columns: 1fr; gap: 2px; } .skills dd { margin-bottom: 10px; } }

/* Contact + footer */
.contact { padding-bottom: 24px; }
.site-footer { padding-top: 48px; padding-bottom: 40px; }
.site-footer p { margin: 0; padding-top: 20px; border-top: 1px solid var(--border); color: var(--muted); font-size: 0.86rem; }