@import url("https://fonts.googleapis.com/css2?family=Nunito:wght@300;400;500;600;700;800&display=swap");

:root {
  --primary-clr: rgba(228, 228, 229, 1);
  --accent: #22d3ee;
  --accent2: #a78bfa;
  --good: #34d399;
  --mid: #fbbf24;
  --bad: #f87171;
  --glass: rgba(28, 22, 37, 0.55);
  --glass-border: rgba(255, 255, 255, 0.14);
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: "Nunito", "Microsoft YaHei", sans-serif; }

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

body {
  position: relative;
  min-height: 100vh;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(34, 211, 238, 0.15), transparent 60%),
    url(https://github.com/ecemgo/mini-samples-great-tricks/assets/13468728/8727c9b1-be21-4932-a221-4257b59a74dd) center/cover fixed;
  background-repeat: no-repeat;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  animation: slidein 120s forwards infinite alternate;
  color: var(--primary-clr);
}

@keyframes slidein {
  0%, 100% { background-position: 20% 0%; background-size: 3400px; }
  50% { background-position: 100% 0%; background-size: 2400px; }
}

.page {
  max-width: 1480px;
  margin: 0 auto;
  padding: 16px 20px 26px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* ---------- glass ---------- */
.glass {
  background: var(--glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--glass-border);
  box-shadow: 0 14px 34px rgba(5, 36, 28, 0.35);
}

.panel {
  border-radius: 20px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.panel-title {
  font-size: 13px; font-weight: 700;
  letter-spacing: 1px;
  opacity: 0.75;
  display: flex; align-items: center; gap: 8px;
}

/* ---------- header ---------- */
.brand-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 22px;
  border-radius: 20px;
}
.logo {
  font-size: 30px;
  width: 48px; height: 48px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  border-radius: 50%;
  color: #0b1120;
  box-shadow: 0 8px 20px rgba(34, 211, 238, 0.35);
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand-text h1 { font-size: 20px; font-weight: 800; letter-spacing: 1px; }
.tagline { font-size: 12px; opacity: 0.6; }

.top-actions { display: flex; align-items: center; gap: 10px; }
.conn-status {
  font-size: 12px;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--glass-border);
  opacity: 0.85;
}
.conn-status.on { color: var(--good); border-color: var(--good); }
.conn-status.warn { color: var(--mid); border-color: var(--mid); }

.lang-select {
  background: rgba(255, 255, 255, 0.09);
  border: 1px solid var(--glass-border);
  color: var(--primary-clr);
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  outline: none;
}
.lang-select:hover { border-color: var(--accent); }
.lang-select option { background: #1c1625; color: var(--primary-clr); }

.btn {
  border: none; cursor: pointer;
  font-size: 14px; font-weight: 700;
  padding: 10px 20px;
  border-radius: 999px;
  transition: transform .08s, filter .15s;
  font-family: inherit;
}
.btn:active { transform: scale(.96); }
.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #0b1120;
  box-shadow: 0 8px 22px rgba(34, 211, 238, 0.3);
}
.btn.primary:hover { filter: brightness(1.12); }
.btn.ghost { background: rgba(255, 255, 255, 0.08); color: var(--primary-clr); border: 1px solid var(--glass-border); }
.btn.ghost:hover { border-color: var(--accent); }
.btn:disabled { opacity: .45; cursor: not-allowed; }

/* ---------- layout ---------- */
.main {
  display: grid;
  grid-template-columns: 350px 1fr 320px;
  gap: 16px;
  align-items: start;
}
@media (max-width: 1150px) { .main { grid-template-columns: 1fr; } }

/* ---------- camera ---------- */
.cam-wrap {
  position: relative;
  border-radius: 14px;
  overflow: hidden;
  background: rgba(0, 0, 0, 0.5);
  aspect-ratio: 4 / 3;
}
.cam-wrap video, .cam-wrap .face-canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
}
.face-canvas { pointer-events: none; }
.cam-overlay {
  position: absolute; inset: 0;
  display: grid; place-items: center;
  font-size: 13px;
  background: rgba(13, 17, 23, 0.4);
}
.cam-overlay.hidden { display: none; }

.face-metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.metric {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 8px 4px;
  text-align: center;
}
.m-label { display: block; font-size: 11px; opacity: 0.65; }
.m-value { display: block; font-size: 13px; font-weight: 700; margin-top: 3px; }
.m-value.good { color: var(--good); }
.m-value.mid { color: var(--mid); }
.m-value.bad { color: var(--bad); }

/* 系统状态 */
.sys-status { display: flex; flex-direction: column; gap: 8px; }
.sys-row {
  display: flex; align-items: center; gap: 10px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  padding: 7px 12px;
}
.sys-name { font-size: 12px; opacity: 0.65; width: 62px; flex-shrink: 0; }
.sys-val { font-size: 12px; font-weight: 700; }
.sys-val.ok { color: var(--good); }
.sys-val.fail { color: var(--bad); }
.sys-val.warn { color: var(--mid); }
.level-track {
  flex: 1; height: 8px;
  background: rgba(0, 0, 0, 0.4);
  border-radius: 999px;
  overflow: hidden;
}
.level-fill {
  height: 100%; width: 0%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--good), var(--accent));
  transition: width .08s linear;
}

/* ---------- player ---------- */
.mode-tabs { display: flex; gap: 8px; margin-bottom: 4px; }
.tab {
  flex: 1;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--glass-border);
  color: var(--primary-clr);
  opacity: 0.7;
  padding: 9px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  font-family: inherit;
  transition: all .2s;
}
.tab.active {
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.35), rgba(167, 139, 250, 0.35));
  border-color: var(--accent);
  opacity: 1;
}
.tab:hover { opacity: 1; }

/* --- swiper 封面轮播 (CodePen 风格) --- */
.song-swiper {
  width: 100%;
  padding: 20px 0 30px;
}
.song-slide {
  position: relative;
  width: 160px;
  border-radius: 12px;
  user-select: none;
  cursor: pointer;
  transition: transform .3s;
}
.cover {
  width: 160px; aspect-ratio: 1/1;
  border-radius: 12px;
  display: grid; place-items: center;
  font-size: 44px;
  -webkit-box-reflect: below -5px linear-gradient(transparent, transparent, rgba(0, 0, 0, 0.4));
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.4);
}
.cover-name {
  text-align: center;
  font-size: 13px;
  font-weight: 600;
  margin-top: 10px;
  opacity: 0.85;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.6);
}
.song-slide.selected .cover {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
  box-shadow: 0 0 24px rgba(34, 211, 238, 0.55);
}
.song-slide.selected .cover-name { color: var(--accent); opacity: 1; }

.swiper-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 4px;
}
.sw-btn {
  width: 40px; aspect-ratio: 1/1;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.09);
  border: 1px solid var(--glass-border);
  color: var(--primary-clr);
  font-size: 14px;
  cursor: pointer;
  transition: all .25s;
}
.sw-btn:hover { background: rgba(255, 255, 255, 0.2); transform: scale(1.06); }
.sw-hint { font-size: 12px; opacity: 0.5; }

/* --- 演唱台 --- */
.stage { display: flex; flex-direction: column; gap: 14px; }
.hidden { display: none !important; }

.song-head { text-align: center; }
.song-title { font-size: 18px; font-weight: 800; line-height: 1.6; }
.phrase-num { font-size: 12px; opacity: 0.55; }
.phrase-lyrics {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: 3px;
  margin-top: 6px;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.55);
}

/* 进度条 (CodePen 风格) */
#progress {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  height: 7px;
  background: rgba(163, 162, 164, 0.4);
  border-radius: 4px;
  margin: 10px 0 4px;
  cursor: pointer;
}
#progress::-webkit-slider-thumb {
  appearance: none;
  -webkit-appearance: none;
  background: rgba(163, 162, 164, 0.9);
  width: 16px;
  aspect-ratio: 1/1;
  border-radius: 50%;
  outline: 4px solid var(--primary-clr);
  box-shadow: 0 6px 10px rgba(5, 36, 28, 0.3);
}

.pitch-area {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  padding: 10px;
  display: flex; flex-direction: column; gap: 8px;
}
#pitchCanvas { width: 100%; height: 150px; border-radius: 10px; display: block; }
.pitch-readout { display: flex; align-items: baseline; gap: 14px; justify-content: center; }
.target-note { font-size: 15px; opacity: 0.6; }
.current-note { font-size: 28px; font-weight: 800; color: var(--accent); text-shadow: 0 0 18px rgba(34, 211, 238, 0.5); }
.cents { font-size: 15px; font-weight: 700; }
.cents.good { color: var(--good); }
.cents.mid { color: var(--mid); }
.cents.bad { color: var(--bad); }

/* 仪表 */
.meters { display: flex; flex-direction: column; gap: 8px; }
.meter {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  padding: 8px 14px;
}
.meter-head { display: flex; justify-content: space-between; margin-bottom: 6px; }
.meter-name { font-size: 13px; font-weight: 600; }
.meter-val { font-size: 14px; font-weight: 800; }
.bar { height: 8px; background: rgba(0, 0, 0, 0.4); border-radius: 999px; overflow: hidden; }
.bar-fill {
  height: 100%; width: 0%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--bad), var(--mid), var(--good));
  box-shadow: 0 0 10px rgba(52, 211, 153, 0.4);
  transition: width .2s ease;
}

/* 圆形控制按钮 (CodePen 风格) */
.controls {
  display: flex;
  justify-content: center;
  align-items: center;
}
.ctrl-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  aspect-ratio: 1/1;
  margin: 8px 14px;
  background: rgba(163, 162, 164, 0.3);
  color: var(--primary-clr);
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.3);
  outline: 0;
  font-size: 1.1rem;
  box-shadow: 0 10px 20px rgba(5, 36, 28, 0.3);
  cursor: pointer;
  transition: all .25s linear;
}
.ctrl-btn:is(:hover, :focus-visible) { transform: scale(0.94); background: rgba(163, 162, 164, 0.5); }
.ctrl-btn:nth-child(2) { transform: scale(1.3); }
.ctrl-btn:nth-child(2):is(:hover, :focus-visible) { transform: scale(1.24); }
.ctrl-btn.playing { background: linear-gradient(135deg, var(--accent), var(--accent2)); color: #0b1120; border-color: transparent; }

/* ---------- 指导面板 ---------- */
.guide-body { flex: 1; min-height: 220px; }
.guide-empty { font-size: 13px; padding: 12px; line-height: 1.7; opacity: 0.55; }
.guide-list { display: flex; flex-direction: column; gap: 8px; }
.guide-item {
  background: rgba(255, 255, 255, 0.07);
  border-left: 4px solid var(--mid);
  border-radius: 10px;
  padding: 9px 12px;
  font-size: 13px;
  line-height: 1.65;
}
.guide-item.good { border-left-color: var(--good); }
.guide-item.bad { border-left-color: var(--bad); }
.guide-item .g-key { font-weight: 700; }

.score-box {
  text-align: center;
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.18), rgba(167, 139, 250, 0.18));
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  padding: 14px;
}
.score-num {
  font-size: 46px; font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.score-label { font-size: 12px; opacity: 0.6; margin-top: 4px; }

.footer { font-size: 12px; opacity: 0.5; text-align: center; padding: 6px; }
.ver-info { opacity: 0.6; margin-left: 8px; }

/* 错误横幅 */
.err-banner {
  position: fixed; top: 0; left: 0; right: 0; z-index: 999;
  background: rgba(248, 113, 113, 0.92);
  color: #fff; font-size: 13px; font-weight: 600;
  padding: 8px 16px; text-align: center;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
}

/* 录音指示灯 */
.rec-ind {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  font-size: 13px; font-weight: 700; color: #f87171;
}
.rec-ind i { animation: blink 1s infinite; font-size: 10px; }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.2; } }

/* ---------- modal ---------- */
.modal {
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: grid; place-items: center;
  z-index: 50;
}
.modal-box {
  width: min(640px, 92vw);
  border-radius: 20px;
  padding: 24px;
  display: flex; flex-direction: column; gap: 12px;
}
.modal-box h3 { font-size: 18px; }
.modal-box p { font-size: 13px; opacity: 0.75; line-height: 1.6; }
.modal-box code { background: rgba(0, 0, 0, 0.4); padding: 2px 6px; border-radius: 5px; color: var(--accent); font-size: 12px; }
.modal-box .hint { font-size: 12px; }
.modal-box textarea {
  width: 100%;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  color: var(--primary-clr);
  padding: 10px;
  font-family: Consolas, monospace;
  font-size: 13px;
  resize: vertical;
}
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; }

.btn.small { padding: 7px 14px; font-size: 12px; border-radius: 999px; }

/* 历史记录 */
.hist-head { display: flex; justify-content: space-between; align-items: center; }
.hist-box h3 { font-size: 18px; }
.hist-summary {
  display: flex; flex-direction: column; gap: 6px;
  max-height: 160px; overflow-y: auto;
  font-size: 13px; opacity: 0.9;
}
.hist-summary .sum-item {
  background: rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  padding: 6px 10px;
}
.hist-list {
  max-height: 300px; overflow-y: auto;
  display: flex; flex-direction: column; gap: 4px;
  font-size: 12px;
}
.hist-row {
  display: grid;
  grid-template-columns: 110px 1fr 44px;
  gap: 8px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  padding: 5px 10px;
  align-items: center;
}
.hist-row .h-time { opacity: 0.6; }
.hist-row .h-song { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hist-row .h-total { font-weight: 800; text-align: right; }
.hist-empty { text-align: center; padding: 18px; font-size: 13px; opacity: 0.55; }