:root {
  --bg: #0a0d12;
  --bg-2: #0e1319;
  --surface: #121821;
  --line: rgb(255 255 255 / 0.08);
  --line-2: rgb(255 255 255 / 0.16);
  --text: #e9eef4;
  --muted: #dcdcdc;
  --dim: #5b6674;
  --accent: #8ccfff;
  --radius: 14px;
  --sans: "Inter", "Noto Sans TC", "PingFang TC", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --ease-portal: cubic-bezier(0.76, 0, 0.24, 1);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(1200px 520px at 78% -10%, rgb(140 207 255 / 0.10), transparent 60%),
    radial-gradient(rgb(255 255 255 / 0.05) 1px, transparent 1px) 0 0 / 28px 28px,
    var(--bg);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.skip-link {
  position: absolute; left: 16px; top: -60px; z-index: 100;
  padding: 8px 12px; border-radius: 8px; background: var(--text); color: var(--bg);
}
.skip-link:focus { top: 12px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; padding: 0 clamp(20px, 4vw, 56px);
  background: linear-gradient(var(--bg) 40%, rgb(10 13 18 / 0));
}
.logo { display: flex; align-items: center; gap: 12px; font-family: var(--mono); font-size: 13px; letter-spacing: 0.18em; }
.logo-mark {
  width: 22px; height: 22px; border-radius: 50%;
  border: 1.5px solid var(--accent);
  box-shadow: inset 0 0 0 4px var(--bg), inset 0 0 0 5.5px rgb(140 207 255 / 0.45), 0 0 18px rgb(140 207 255 / 0.35);
}
.topbar nav { display: flex; gap: clamp(16px, 3vw, 36px); font-size: 14px; color: var(--muted); }
.topbar nav a:hover { color: var(--text); }

/* ---------- KV ---------- */
.kv {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  align-items: center;
  gap: clamp(24px, 4vw, 64px);
  min-height: clamp(440px, 60vh, 600px);
  padding: 12px clamp(20px, 4vw, 56px) 40px;
  max-width: 1440px; margin: 0 auto;
}
.kv-eyebrow {
  display: flex; align-items: center; gap: 10px; margin: 0 0 24px;
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.2em; color: var(--accent);
}
.pulse { position: relative; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); }
.pulse::after {
  content: ""; position: absolute; inset: -5px; border-radius: 50%; border: 1px solid var(--accent);
  animation: pulse 2.4s ease-out infinite;
}
@keyframes pulse { from { transform: scale(0.4); opacity: 1; } to { transform: scale(1.6); opacity: 0; } }

.kv h1 {
  margin: 0; font-size: clamp(34px, 4.6vw, 64px); line-height: 1.18; letter-spacing: -0.02em; font-weight: 700;
}
.kv h1 em { font-style: normal; color: transparent; background: linear-gradient(92deg, #b9e4ff 0%, #8fd3ff 55%, #a9e2ff 100%); -webkit-background-clip: text; background-clip: text; }
.kv-desc { max-width: 560px; margin: 24px 0 32px; color: var(--muted); font-size: 16px; }
.kv-actions { display: flex; align-items: center; gap: 28px; flex-wrap: wrap; }
.button {
  display: inline-flex; align-items: center; gap: 10px;
  height: 46px; padding: 0 22px; border-radius: 999px;
  border: 1px solid rgb(140 207 255 / 0.5);
  background: rgb(140 207 255 / 0.08);
  font-weight: 600; font-size: 15px;
  transition: background 200ms ease, box-shadow 200ms ease, transform 200ms ease;
}
.button:hover { background: rgb(140 207 255 / 0.16); box-shadow: 0 0 28px rgb(140 207 255 / 0.25); }
.button span { transition: transform 200ms ease; }
.button:hover span { transform: translateY(3px); }
.text-link { color: var(--muted); font-size: 14px; font-weight: 600; border-bottom: 1px solid #8ccfff90; padding-bottom: 6px; }
.text-link:hover { color: #8ccfff; }

/* ---------- work ---------- */
.work { max-width: 1440px; margin: 0 auto; padding: 8px clamp(20px, 4vw, 56px) 72px; scroll-margin-top: 56px; }
.work-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; flex-wrap: wrap; margin-bottom: 28px; }
.section-label { margin: 0 0 6px; font-family: var(--mono); font-size: 12px; letter-spacing: 0.2em; color: var(--dim); }
.work-head h2 { margin: 0; font-size: 28px; letter-spacing: -0.01em; }
.filters { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  height: 34px; padding: 0 14px; border-radius: 999px;
  border: 1px solid var(--line-2); background: transparent; color: var(--muted);
  font: 500 13px/1 var(--sans); cursor: pointer;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}
.chip:hover { color: var(--text); border-color: rgb(255 255 255 / 0.3); }
.chip[aria-pressed="true"] { color: var(--bg); background: var(--text); border-color: var(--text); }

.grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 36px 24px; }

.card { --accent: #8ccfff; position: relative; display: flex; flex-direction: column; min-width: 0; transition: opacity 300ms ease, transform 300ms ease; }
.card.is-hidden { display: none; }
.card-cover {
  position: relative; aspect-ratio: 4 / 3; overflow: hidden;
  border-radius: var(--radius);
  background: radial-gradient(120% 90% at 70% 20%, color-mix(in srgb, var(--accent) 22%, #121821), #0d1117 70%);
  box-shadow: 0 0 0 1px var(--line);
  transition: box-shadow 260ms ease;
}
.card-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 700ms cubic-bezier(0.2, 0.7, 0.2, 1); }
.card-cover.fit-float { padding: 9% 8% 0; }
.card-cover.fit-float img { height: auto; min-height: 100%; object-fit: cover; object-position: top left; border-radius: 8px 8px 0 0; box-shadow: 0 12px 40px rgb(0 0 0 / 0.5); }
.card-cover::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgb(10 13 18 / 0) 55%, rgb(10 13 18 / 0.55)); pointer-events: none; }
.card-no, .card-flag {
  position: absolute; z-index: 2; top: 12px;
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em;
  padding: 4px 8px; border-radius: 6px; background: rgb(10 13 18 / 0.6); backdrop-filter: blur(8px); color: var(--text);
}
.card-no { left: 12px; }
.card-flag { right: 12px; color: var(--accent); }
.card-body { padding: 16px 2px 0; }
.card-meta { display: flex; gap: 8px; font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.06em; color: var(--dim); }
.card h3 { margin: 6px 0 6px; font-size: 18px; line-height: 1.35; font-weight: 600; letter-spacing: -0.005em; }
.card p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.card-tags span { font-size: 12px; color: var(--muted); padding: 2px 9px; border-radius: 999px; border: 1px solid var(--line); }

a.card:hover .card-cover, a.card:focus-visible .card-cover { box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 70%, transparent), 0 0 34px color-mix(in srgb, var(--accent) 28%, transparent); }
a.card:hover .card-cover img { transform: scale(1.045); }
a.card:focus-visible { outline: none; }

.card.is-soon .card-cover img { filter: saturate(0.55) brightness(0.72); }
.card.is-soon .card-flag { color: var(--muted); }
.card.is-soon h3 { color: #c3ccd6; }

/* abstract cover for projects without imagery yet */
.cover-abstract { position: absolute; inset: 0; display: grid; place-items: center; }
.cover-abstract::before {
  content: ""; width: 46%; aspect-ratio: 2.4; border-radius: 999px;
  border: 1.5px solid color-mix(in srgb, var(--accent) 70%, transparent);
  box-shadow: 0 0 40px color-mix(in srgb, var(--accent) 30%, transparent), inset 0 0 30px color-mix(in srgb, var(--accent) 18%, transparent);
  -webkit-mask: radial-gradient(circle at 25% 50%, #000 0 30%, transparent 30.5%), radial-gradient(circle at 75% 50%, #000 0 30%, transparent 30.5%), linear-gradient(#000 0 0) center / 12% 4% no-repeat;
}
.cover-abstract span { position: absolute; bottom: 14%; font-family: var(--mono); font-size: 11px; letter-spacing: 0.24em; color: var(--muted); }

/* ---------- footer ---------- */
.footer { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; max-width: 1440px; margin: 0 auto; padding: 28px clamp(20px, 4vw, 56px) 40px; border-top: 1px solid var(--line); font-family: var(--mono); font-size: 12px; color: var(--dim); }
.footer a:hover { color: var(--text); }

/* ---------- portal transition (animated in shared/transition.js) ---------- */
@view-transition { navigation: auto; }
::view-transition-old(root), ::view-transition-new(root) { animation: none; mix-blend-mode: normal; }
html[data-kc-nav="return"]::view-transition-old(root) { z-index: 2; }

/* ---------- responsive ---------- */
@media (max-width: 1180px) { .grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 900px) {
  .kv { grid-template-columns: 1fr; min-height: 0; padding-top: 24px; }
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 560px) {
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 12px; }
  .card h3 { font-size: 15px; }
  .card p { font-size: 12px; }
  .card-flag { font-size: 8px; letter-spacing: 0.04em; }
  .topbar nav { gap: 16px; }
}

/* Company and year retained in metadata, temporarily hidden on homepage cards. */
.card-meta { display: none; }

/* Homepage text and controls aligned with the current Figma frame. */
.topbar .logo,.topbar nav,.topbar nav a,.kv h1,#kv-title,#work-title,.chip,.card .card-flag,.card h3,.button{color:#ffffff}
.chip:hover,.card:hover h3{color:#ffffff}
.chip[aria-pressed="true"]{background:#ffffff;border-color:#ffffff;color:var(--bg)}

/* Consistent thumbnail labels and card interaction color. */
.card .card-flag,.card:hover h3,.card:focus-visible h3{color:#8ccfff}
a.card:hover .card-cover,a.card:focus-visible .card-cover{box-shadow:0 0 0 1px #8ccfff,0 0 34px rgb(140 207 255 / .28)}
.card ::selection{background:#8ccfff;color:#0a0d12}