:root {
  --bg: #0d1117;
  --surface: #161b22;
  --surface-2: #21262d;
  --border: #30363d;
  --text: #e6edf3;
  --muted: #9198a1;
  --accent: #2f81f7;
  --accent-strong: #1f6feb;
  --en: #58a6ff;
  --de: #f0b429;
  --fr: #ff7b72;
  --ok: #3fb950;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
}

#app {
  max-width: 640px;
  margin: 0 auto;
  padding: env(safe-area-inset-top) 16px calc(env(safe-area-inset-bottom) + 16px);
}

.screen { padding-block: 16px; }
[hidden] { display: none !important; }

/* ---------- Home ---------- */
.app-header { text-align: center; margin: 24px 0 20px; }
.app-header h1 { font-size: 1.9rem; margin: 0 0 6px; }
.subtitle { color: var(--muted); margin: 0; font-size: 1rem; }

.topic-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.topic-btn {
  width: 100%;
  text-align: left;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 18px;
  color: var(--text);
  font-size: 1.15rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: transform .08s ease, border-color .15s ease;
}
.topic-btn:active { transform: scale(.985); border-color: var(--accent); }
.topic-btn .count { color: var(--muted); font-size: .85rem; font-weight: 500; }
.topic-btn .chevron { color: var(--accent); font-size: 1.3rem; }

.hint {
  margin-top: 24px;
  color: var(--muted);
  font-size: .9rem;
  line-height: 1.5;
  text-align: center;
}

/* ---------- Player ---------- */
.player-header { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.player-heading { display: flex; flex-direction: column; }
.player-heading h2 { margin: 0; font-size: 1.25rem; }
.progress { color: var(--muted); font-size: .85rem; }

.icon-btn {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 10px;
  width: 44px; height: 44px;
  font-size: 1.3rem;
  cursor: pointer;
  flex: none;
}
.icon-btn:active { background: var(--border); }

.phrase-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px;
  display: grid;
  gap: 14px;
}
.lang-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: start;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid transparent;
  transition: background .2s ease, border-color .2s ease;
}
.lang-row .flag { font-size: 1.5rem; line-height: 1.5; }
.phrase-text { margin: 0; font-size: 1.15rem; line-height: 1.55; }
.lang-row[data-active="en"] .phrase-text { color: var(--text); }

/* Highlight the language currently being spoken */
.lang-row.speaking { background: var(--surface-2); }
.lang-row[data-active="en"].speaking { border-color: var(--en); }
.lang-row[data-active="de"].speaking { border-color: var(--de); }
.lang-row[data-active="fr"].speaking { border-color: var(--fr); }

.status {
  text-align: center;
  color: var(--muted);
  margin: 18px 0;
  min-height: 1.4em;
  font-size: .95rem;
}

.controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 18px;
  margin-bottom: 18px;
}
.ctrl-btn {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 50%;
  width: 68px; height: 68px;
  font-size: 1.5rem;
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: transform .08s ease, background .15s ease;
}
.ctrl-btn:active { transform: scale(.92); }
.ctrl-btn.play {
  width: 88px; height: 88px;
  font-size: 2rem;
  background: var(--accent);
  border-color: var(--accent-strong);
  color: #fff;
}
.ctrl-btn.play:active { background: var(--accent-strong); }

/* Options — spaced out with large touch targets for gloved fingers. */
.options {
  display: grid;
  gap: 16px;
  margin-top: 8px;
}
.option-row {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px 18px;
  min-height: 64px;
}
.option-label { font-size: 1.05rem; color: var(--text); }

/* Toggle rows: label left, big checkbox right, whole row tappable. */
.option-row.toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
}
.option-row.toggle input[type="checkbox"] {
  width: 32px;
  height: 32px;
  accent-color: var(--accent);
  flex: none;
}

/* Speed row: heading + value on top, wide slider below. */
.speed-row { display: grid; gap: 14px; align-content: center; }
.speed-head { display: flex; align-items: baseline; justify-content: space-between; }
.speed-head .val { color: var(--accent); font-weight: 700; font-size: 1.15rem; }

#speedRange {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 36px;               /* tall hit area for gloves */
  background: transparent;
  cursor: pointer;
}
#speedRange::-webkit-slider-runnable-track {
  height: 10px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
}
#speedRange::-moz-range-track {
  height: 10px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
}
#speedRange::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 36px;
  height: 36px;
  margin-top: -14px;          /* centre the thumb on the track */
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,.45);
}
#speedRange::-moz-range-thumb {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,.45);
}

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: calc(env(safe-area-inset-bottom) + 20px);
  transform: translateX(-50%);
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 12px 18px;
  border-radius: 10px;
  font-size: .9rem;
  max-width: 90%;
  text-align: center;
  box-shadow: 0 8px 24px rgba(0,0,0,.4);
  z-index: 50;
}