:root {
  --bg: #efe8dc;
  --bg-2: #e7f0ea;
  --card: #fffdf8;
  --ink: #1c2430;
  --muted: #5c564c;
  --line: #e3d7c6;
  --accent: #1f6b4a;
  --accent-2: #174f37;
  --accent-soft: #e5f3eb;
  --rec: #b42318;
  --warn-bg: #fff1ee;
  --warn-ink: #8a2218;
  --shadow: 0 12px 32px rgba(62, 44, 22, 0.08);
  --safe-b: env(safe-area-inset-bottom);
  color-scheme: light;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html, body { margin: 0; min-height: 100%; }

body {
  background:
    radial-gradient(1200px 400px at 50% -10%, #f7f3ea 0%, transparent 60%),
    var(--bg-2);
  color: var(--ink);
  font-family: "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", "Heiti TC", sans-serif;
  font-size: 17px;
  line-height: 1.5;
}

button, input, textarea { font: inherit; color: inherit; }

button { cursor: pointer; }

a { color: var(--accent-2); }

.app {
  width: min(440px, 100%);
  margin: 0 auto;
  min-height: 100dvh;
  background: var(--bg);
  padding: 22px 18px calc(92px + var(--safe-b));
}

body.no-tabs .app { padding-bottom: calc(28px + var(--safe-b)); }
body.no-tabs .tabbar { display: none; }

.top { margin-bottom: 14px; }

.eyebrow {
  margin: 0;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 12px;
  color: var(--accent);
  font-weight: 700;
}

h1, h2, h3 { line-height: 1.25; margin: 0; }

h1 { font-size: 1.7rem; letter-spacing: -0.02em; }
h2 { font-size: 1.35rem; }
h3 { font-size: 0.95rem; margin-top: 12px; }

.lead, .fine, .en-title, .kicker { color: var(--muted); }
.fine { font-size: 0.92rem; }
.en-title { margin: 4px 0 8px; font-size: 0.95rem; }
.kicker { margin: 0 0 6px; font-size: 0.82rem; font-weight: 700; color: var(--accent); letter-spacing: 0.04em; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 16px;
  box-shadow: var(--shadow);
}

.stack { display: grid; gap: 12px; }
.view { display: none; }
.view.active { display: grid; gap: 14px; }

.row { display: flex; flex-wrap: wrap; gap: 8px; }

label { font-weight: 650; }

input, textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 16px;
}

textarea { min-height: 84px; resize: vertical; }

.key-row { display: grid; grid-template-columns: 1fr auto; gap: 8px; align-items: center; }

.primary, .ghost, .danger {
  border-radius: 999px;
  min-height: 48px;
  padding: 10px 16px;
  border: 1px solid transparent;
}

.primary { background: var(--accent); color: #f4fff8; }
.primary:disabled { opacity: 0.55; }
.xl { width: 100%; font-size: 1.05rem; font-weight: 700; }
.ghost { background: transparent; border-color: var(--line); color: var(--ink); }
.danger { background: var(--rec); color: white; width: 100%; }

.segment { display: grid; grid-template-columns: repeat(auto-fit, minmax(0, 1fr)); gap: 6px; }
.segment button {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 12px;
  min-height: 48px;
}
.segment button[aria-pressed="true"] {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

fieldset {
  border: 1px solid var(--line);
  margin: 0;
}
legend { padding: 0 6px; font-weight: 700; }

.phrases { margin: 8px 0 0; padding-left: 1.2rem; display: grid; gap: 10px; }
.phrases li { display: grid; gap: 2px; }
.phrase-en { font-weight: 650; }
.phrase-zh { color: var(--muted); font-size: 0.92rem; }

.banner, .form-error { margin: 0; }
.banner, .form-error:not(:empty) {
  background: var(--warn-bg);
  color: var(--warn-ink);
  border-radius: 12px;
  padding: 10px 12px;
}
.form-error:empty { display: none; }

.clock { margin: 0; font-variant-numeric: tabular-nums; color: var(--muted); }
.status { margin: 0; font-weight: 700; min-height: 1.5em; }

.talk {
  width: 168px;
  height: 168px;
  margin: 8px auto;
  border-radius: 50%;
  border: 0;
  background: var(--accent);
  color: white;
  box-shadow: var(--shadow);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 1.15rem;
}
.talk:disabled { background: #8aa396; }
.talk.is-recording {
  background: var(--rec);
  animation: pulse 1.1s ease-in-out infinite;
}
.talk.is-live { background: var(--accent-2); }
.talk:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 3px solid #8dcaa8;
  outline-offset: 2px;
}

@keyframes pulse {
  50% { transform: scale(1.04); }
}

.rec-timer { min-height: 1.4em; text-align: center; font-weight: 700; color: var(--rec); margin: 0; }
#talk-hint, #session-status, #session-clock, #session-topic, #session-kicker { text-align: center; }
#session-topic { overflow-wrap: anywhere; }

details {
  background: var(--card);
  border-radius: 16px;
  border: 1px solid var(--line);
  padding: 10px 14px;
}
summary { min-height: 44px; display: grid; align-items: center; cursor: pointer; font-weight: 700; }

.transcript { display: grid; gap: 10px; padding-bottom: 8px; }
.line { display: grid; gap: 2px; }
.who { font-size: 0.78rem; font-weight: 700; color: var(--muted); }
.line.model .who { color: var(--accent); }
.bubble {
  background: #fff;
  border-radius: 12px;
  padding: 8px 10px;
  overflow-wrap: anywhere;
}
.line.model .bubble { background: var(--accent-soft); }
.empty { color: var(--muted); margin: 0; }

.fb-block { display: grid; gap: 8px; }
.fb-block h3 { margin-top: 4px; }
.pair { display: grid; gap: 4px; padding-top: 8px; border-top: 1px solid var(--line); }
.tag { font-size: 0.78rem; font-weight: 700; color: var(--muted); margin: 0; }
.note { margin: 0; color: var(--muted); }

.history-item { text-align: left; width: 100%; border-radius: 16px; }
.history-item strong { display: block; }
.history-open { border-color: var(--accent); }

.tabbar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  background: #fffdf8;
  border-top: 1px solid var(--line);
  padding-bottom: var(--safe-b);
}
.tabbar button {
  border: 0;
  background: transparent;
  min-height: 56px;
  color: var(--muted);
}
.tabbar button[aria-current="page"] { color: var(--accent); font-weight: 700; }

.limits ul { margin: 0; padding-left: 1.1rem; display: grid; gap: 8px; }

@media (prefers-reduced-motion: reduce) {
  .talk.is-recording { animation: none; }
}