:root {
  --bg1: #0f1424;
  --bg2: #1b2340;
  --card: rgba(255, 255, 255, 0.06);
  --card-border: rgba(255, 255, 255, 0.12);
  --text: #eef1fb;
  --muted: #9aa3c0;
  --accent: #5b8cff;
  --accent2: #8f6bff;
  --danger: #ff5d6c;
  --radius: 16px;
}

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

body {
  font-family: "Noto Sans TC", "Microsoft JhengHei", system-ui, sans-serif;
  background: radial-gradient(1200px 800px at 20% -10%, var(--bg2), var(--bg1));
  color: var(--text);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 24px 14px 60px;
}

.app { width: 100%; max-width: 520px; display: flex; flex-direction: column; gap: 16px; }

.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 22px;
  backdrop-filter: blur(10px);
}

/* ---- 時鐘 ---- */
.clock-panel { text-align: center; padding: 30px 20px; }
#clockTime {
  font-size: clamp(52px, 15vw, 76px);
  font-weight: 700;
  letter-spacing: 2px;
  font-variant-numeric: tabular-nums;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
#clockDate { margin-top: 6px; color: var(--muted); font-size: 15px; }

/* ---- 分頁 ---- */
.tabs { display: flex; gap: 8px; }
.tab-btn {
  flex: 1;
  padding: 11px 6px;
  border: 1px solid var(--card-border);
  border-radius: 12px;
  background: transparent;
  color: var(--muted);
  font-size: 14.5px;
  cursor: pointer;
  transition: all .18s;
}
.tab-btn.active { background: linear-gradient(135deg, var(--accent), var(--accent2)); color: #fff; border-color: transparent; }
.tab-btn:not(.active):hover { color: var(--text); background: rgba(255,255,255,.05); }
.tab { display: none; }
.tab.active { display: block; animation: fade .25s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; } }

h2 { font-size: 19px; margin-bottom: 16px; }

.row { display: flex; align-items: center; gap: 12px; margin-top: 14px; flex-wrap: wrap; }
.field-label { color: var(--muted); font-size: 14px; }
.hint { color: var(--muted); font-size: 13px; margin-top: 10px; line-height: 1.6; }

input[type="time"], input[type="number"], select {
  background: rgba(0,0,0,.3);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  color: var(--text);
  padding: 9px 12px;
  font-size: 17px;
}
input[type="number"] { width: 64px; text-align: center; }
select { font-size: 15px; }

button.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  border: none;
  border-radius: 12px;
  padding: 11px 26px;
  font-size: 16px;
  cursor: pointer;
  transition: filter .15s;
}
button.primary:hover { filter: brightness(1.12); }
button.ghost {
  background: transparent;
  border: 1px solid var(--card-border);
  color: var(--text);
  border-radius: 12px;
  padding: 11px 20px;
  font-size: 15px;
  cursor: pointer;
}
button.ghost:hover { background: rgba(255,255,255,.07); }
button.big { font-size: 17px; padding: 13px 28px; }

/* ---- 開關 ---- */
.switch-wrap { display: inline-flex; align-items: center; gap: 10px; cursor: pointer; user-select: none; }
.switch-wrap input { display: none; }
.switch {
  width: 48px; height: 27px;
  background: rgba(255,255,255,.18);
  border-radius: 999px;
  position: relative;
  transition: background .2s;
}
.switch::after {
  content: "";
  position: absolute;
  top: 3px; left: 3px;
  width: 21px; height: 21px;
  border-radius: 50%;
  background: #fff;
  transition: left .2s;
}
.switch-wrap input:checked + .switch { background: var(--accent); }
.switch-wrap input:checked + .switch::after { left: 24px; }
#alarmStateText { font-size: 14px; color: var(--muted); }
#alarmStateText.on { color: #7ee787; }

/* ---- 倒數 ---- */
#timerDisplay {
  text-align: center;
  font-size: clamp(56px, 16vw, 84px);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 2px;
  margin: 6px 0 4px;
}
.presets { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-top: 8px; }
.presets button {
  border: 1px solid var(--card-border);
  background: transparent;
  color: var(--text);
  border-radius: 999px;
  padding: 7px 16px;
  font-size: 14px;
  cursor: pointer;
}
.presets button:hover { background: rgba(255,255,255,.08); }
.controls { justify-content: center; }
.custom-time { justify-content: center; color: var(--muted); }

/* ---- 鈴聲清單 ---- */
.sound-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 4px;
  border-bottom: 1px dashed rgba(255,255,255,.1);
  flex-wrap: wrap;
}
.sound-item:last-child { border-bottom: none; }
.sound-name { flex: 1 1 140px; min-width: 130px; font-size: 15px; }
.sound-name small { display: block; color: var(--muted); font-size: 12px; margin-top: 2px; }
.sound-item button {
  border: 1px solid var(--card-border);
  background: transparent;
  color: var(--text);
  border-radius: 9px;
  padding: 6px 12px;
  font-size: 13.5px;
  cursor: pointer;
  white-space: nowrap;
}
.sound-item button:hover { background: rgba(255,255,255,.08); }
.sound-item button.recording { color: #fff; background: var(--danger); border-color: transparent; animation: pulse 1s infinite; }
@keyframes pulse { 50% { opacity: .65; } }

.volume-row input[type="range"] { flex: 1; accent-color: var(--accent); }

/* ---- 響鈴遮罩 ---- */
.overlay {
  position: fixed; inset: 0;
  background: rgba(8, 10, 20, .82);
  backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
}
.overlay.hidden, .hidden { display: none !important; }
.ring-box {
  background: var(--bg2);
  border: 1px solid var(--card-border);
  border-radius: 22px;
  padding: 40px 36px;
  text-align: center;
  max-width: 340px;
  width: calc(100% - 40px);
  animation: pop .3s ease;
}
@keyframes pop { from { transform: scale(.85); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.ring-icon { font-size: 54px; animation: swing 1s infinite; }
@keyframes swing { 0%,100% { transform: rotate(-14deg); } 50% { transform: rotate(14deg); } }
.ring-box h2 { margin: 14px 0 6px; font-size: 24px; }
.ring-box p { color: var(--muted); margin-bottom: 22px; }
.ring-box .row { justify-content: center; }

.toast {
  position: fixed;
  bottom: 26px; left: 50%;
  transform: translateX(-50%);
  background: rgba(20,26,46,.95);
  border: 1px solid var(--card-border);
  color: var(--text);
  padding: 10px 22px;
  border-radius: 999px;
  font-size: 14px;
  z-index: 200;
}

@media (max-width: 420px) {
  .tab-btn { font-size: 13px; padding: 10px 4px; }
  .sound-item button { padding: 6px 9px; font-size: 12.5px; }
}