/* THEODORE LAB — homepage v1 (Hybrid Portfolio Lab, structure-first).
   All visual decisions live in the tokens block below so a later
   site-remix pass can reskin without touching the structure. */

/* ============ design tokens ============ */
:root {
  --bg: #0e0e0c;
  --bg-raise: #161613;
  --ink: #e8e6df;
  --ink-dim: #9a988f;
  --ink-faint: #55534c;
  --line: #26251f;
  --accent: #d8ff3e;            /* lab-notebook highlighter */
  --font-display: 'Songti SC', 'Noto Serif SC', Georgia, 'Times New Roman', serif;
  --font-body: system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: ui-monospace, 'Cascadia Code', Consolas, monospace;
  --max-w: 1080px;
  --pad-x: clamp(20px, 5vw, 56px);
  --sec-gap: clamp(72px, 12vh, 140px);
}

/* ============ base ============ */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
main { max-width: var(--max-w); margin: 0 auto; padding: 0 var(--pad-x); }

/* bilingual: exactly one language visible at a time */
html[data-lang="zh"] .en, html[data-lang="en"] .zh { display: none; }

/* ============ header ============ */
.site-head {
  max-width: var(--max-w); margin: 0 auto;
  padding: 22px var(--pad-x);
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.wordmark { font-family: var(--font-mono); font-size: 15px; letter-spacing: .14em; font-weight: 700; }
.wordmark span { color: var(--accent); }
.head-right { display: flex; align-items: center; gap: 18px; }
.status-chip {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .08em;
  color: var(--ink-dim); border: 1px solid var(--line); border-radius: 999px;
  padding: 4px 12px;
}
.status-chip .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); animation: pulse 2.4s infinite; }
@keyframes pulse { 0%,100% { opacity: 1 } 50% { opacity: .35 } }
.lang-toggle {
  background: none; border: 0; cursor: pointer;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .06em;
  color: var(--ink-faint); display: inline-flex; gap: 6px; align-items: center;
}
.lang-toggle .sep { opacity: .4; }
.lang-toggle [data-lang].on { color: var(--ink); }
.lang-toggle:hover [data-lang]:not(.on) { color: var(--ink-dim); }

/* ============ hero ============ */
.hero { padding: calc(var(--sec-gap) * .8) 0 var(--sec-gap); }
.hero-eyebrow { font-family: var(--font-mono); font-size: 12px; letter-spacing: .22em; color: var(--ink-faint); text-transform: uppercase; }
.hero-name {
  font-family: var(--font-display);
  font-size: clamp(52px, 9vw, 108px);
  font-weight: 500; line-height: 1.05; letter-spacing: .01em;
  margin: 18px 0 10px;
}
.hero-role { font-family: var(--font-mono); font-size: 14px; letter-spacing: .1em; color: var(--accent); margin-bottom: 28px; }
.hero-line { max-width: 620px; font-size: 17px; color: var(--ink-dim); margin-bottom: 22px; }
.hero-meta { font-family: var(--font-mono); font-size: 12px; letter-spacing: .04em; color: var(--ink-faint); }

/* ============ section label ============ */
.sec-label {
  display: flex; align-items: baseline; gap: 12px;
  font-family: var(--font-mono); font-size: 12px; font-weight: 400;
  letter-spacing: .22em; text-transform: uppercase; color: var(--ink-faint);
  border-bottom: 1px solid var(--line);
  padding-bottom: 12px; margin-bottom: 8px;
}
.sec-count { color: var(--accent); margin-left: auto; }

/* ============ works index ============ */
.works { margin-bottom: var(--sec-gap); }
.work-row {
  display: grid;
  grid-template-columns: 3.2em minmax(180px, 240px) 1fr 2em;
  gap: clamp(16px, 3vw, 32px);
  align-items: center;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
  transition: background .25s;
}
.work-row:hover { background: var(--bg-raise); }
.work-num { font-family: var(--font-mono); font-size: 13px; color: var(--ink-faint); align-self: start; padding-top: 4px; }
.work-thumb {
  display: block; aspect-ratio: 8 / 5; overflow: hidden;
  border: 1px solid var(--line); background: var(--bg-raise);
}
.work-thumb img { width: 100%; height: 100%; object-fit: cover; object-position: top; display: block; filter: saturate(.85); transition: transform .5s, filter .3s; }
.work-row:hover .work-thumb img { transform: scale(1.03); filter: saturate(1); }
.work-thumb.noimg img { display: none; }
.work-thumb.noimg { background: linear-gradient(135deg, var(--bg-raise), var(--line)); }
.work-body { display: flex; flex-direction: column; gap: 8px; }
.work-title { font-family: var(--font-display); font-size: clamp(22px, 3vw, 30px); letter-spacing: .04em; }
.work-title .ext { color: var(--accent); font-size: .7em; }
.work-desc { color: var(--ink-dim); font-size: 14.5px; max-width: 520px; }
.work-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.tag {
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .05em;
  color: var(--ink-dim); border: 1px solid var(--line); border-radius: 3px;
  padding: 2px 8px;
}
.tag-status { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 35%, transparent); }
.work-arrow { font-size: 20px; color: var(--ink-faint); transition: color .25s, transform .25s; }
.work-row:hover .work-arrow { color: var(--accent); transform: translateX(4px); }

/* ============ about ============ */
.about { margin-bottom: var(--sec-gap); }
.about-text { max-width: 640px; color: var(--ink-dim); font-size: 15.5px; margin-top: 22px; }
.about-text .zh, .about-text .en { display: inline; }
html[data-lang="zh"] .about-text .en, html[data-lang="en"] .about-text .zh { display: none; }

/* ============ footer ============ */
.site-foot {
  max-width: var(--max-w); margin: 0 auto;
  padding: 40px var(--pad-x) 48px;
  border-top: 1px solid var(--line);
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px;
}
.foot-links { display: flex; gap: 26px; font-family: var(--font-mono); font-size: 12px; letter-spacing: .12em; }
.foot-links a { color: var(--ink-dim); transition: color .2s; }
.foot-links a:hover { color: var(--accent); }
.foot-links .todo-link { opacity: .45; cursor: default; }
.foot-colophon { font-family: var(--font-mono); font-size: 11px; color: var(--ink-faint); }

/* ============ responsive ============ */
@media (max-width: 760px) {
  .work-row { grid-template-columns: 2.4em 1fr 1.6em; }
  .work-thumb { grid-column: 2 / 4; order: 5; max-width: 420px; }
  .status-chip { display: none; }
}