/* TalkSound site — rack-unit design system
   沿用 extension 的器材識別:機箱深色、VU 琥珀、絲印奶油字 */

:root {
  --bg: #16140f;        /* 機架背板,比 popup 再深一階 */
  --chassis: #1b1916;   /* 機箱 */
  --panel: #242019;     /* 面板 */
  --line: #3a342a;      /* 刻線 */
  --text: #efe8da;      /* 絲印 */
  --muted: #9a907d;
  --amber: #e8a33d;     /* VU 燈 */
  --amber-dim: #6b4d1d;
  --in-gray: #6f675a;

  --font-display: "Chakra Petch", "PingFang TC", "Microsoft JhengHei", sans-serif;
  --font-body: "IBM Plex Sans", "PingFang TC", "Microsoft JhengHei", "Hiragino Sans", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 20px;
}

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

/* ---- 頂列:語言切換 ---- */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 0;
}
.topbar .mark {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--muted);
}
.langs { display: flex; gap: 6px; }
.langs button {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  padding: 5px 10px;
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
}
.langs button[aria-pressed="true"] {
  color: var(--amber);
  border-color: var(--amber-dim);
}

/* ---- Rack unit(區段面板)---- */
.rack {
  background: var(--chassis);
  border: 1px solid var(--line);
  border-radius: 10px;
  margin: 26px 0;
  overflow: hidden;
}
.rack-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--muted);
  padding: 14px 24px 0;
}
.rack-body { padding: 18px 24px 26px; }

/* ---- Hero ---- */
.hero { padding: 28px 0 4px; }
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: center;
}
.hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(40px, 6vw, 58px);
  letter-spacing: 0.06em;
  line-height: 1.05;
}
.hero h1 .amber { color: var(--amber); }
.tagline {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 19px;
  margin: 14px 0 10px;
}
.sub { color: var(--muted); font-size: 15px; max-width: 42ch; }

.cta-row { display: flex; gap: 12px; margin-top: 26px; flex-wrap: wrap; }
.btn {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.04em;
  padding: 12px 22px;
  border-radius: 8px;
  border: 1px solid var(--amber);
}
.btn-solid { background: var(--amber); color: #1b1207; }
.btn-solid:hover { text-decoration: none; filter: brightness(1.08); }
.btn-ghost { color: var(--amber); }
.btn-ghost:hover { text-decoration: none; background: rgba(232, 163, 61, 0.08); }

/* ---- Scope 模擬器(signature)---- */
.scope-unit {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}
.scope-unit svg { display: block; width: 100%; height: auto; }
.scope-strip {
  display: flex;
  align-items: center;
  gap: 10px;
  border-top: 1px solid var(--line);
  padding: 9px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
}
.scope-strip .track {
  flex: 1; height: 4px; border-radius: 2px;
  background: var(--line); overflow: hidden;
}
.scope-strip .fill {
  height: 100%; width: 62%;
  background: linear-gradient(90deg, var(--amber-dim), var(--amber));
}

/* ---- 條列(問題/訊號鏈)---- */
.rows { display: grid; gap: 14px; margin-top: 6px; }
.row { display: grid; grid-template-columns: 130px 1fr; gap: 18px; align-items: baseline; }
.row .k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--amber);
}
.row .v { color: var(--text); font-size: 15px; }
.row .v small { display: block; color: var(--muted); }

/* ---- 功能格 ---- */
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 8px;
}
.cell {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px 16px 18px;
}
.cell h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.cell h3 .led {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 7px var(--amber);
  flex: none;
}
.cell p { font-size: 13.5px; color: var(--muted); line-height: 1.65; }

/* ---- 訊號鏈 ---- */
.chain {
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 2;
  color: var(--muted);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px 20px;
  overflow-x: auto;
  white-space: pre;
  margin-top: 8px;
}
.chain b { color: var(--amber); font-weight: 500; }

/* ---- Privacy unit ---- */
.rack.privacy { border-color: var(--amber-dim); }
.privacy .rack-label { color: var(--amber); }

/* ---- 內文頁(privacy.html)---- */
.prose h2 {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  margin: 26px 0 8px;
}
.prose p, .prose li { color: var(--muted); font-size: 15px; }
.prose ul { padding-left: 22px; margin: 8px 0; }
.prose strong { color: var(--text); font-weight: 600; }
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  font-size: 14px;
}
.prose th, .prose td {
  text-align: left;
  padding: 9px 12px;
  border: 1px solid var(--line);
  color: var(--muted);
}
.prose th {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text);
}
.prose code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1px 6px;
}

/* ---- Footer ---- */
footer {
  padding: 14px 0 44px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
}
footer .links { display: flex; gap: 18px; }

/* ---- RWD ---- */
@media (max-width: 760px) {
  .hero-grid { grid-template-columns: 1fr; gap: 26px; }
  .grid { grid-template-columns: 1fr; }
  .row { grid-template-columns: 1fr; gap: 2px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}