/* =========================================================
   设计令牌 —— 深色极简 / 现代流媒体风格
   ========================================================= */
:root {
  --bg: #0b0b0d;
  --bg-deep: #000000;
  --surface: #161618;
  --surface-2: #1f1f22;
  --line: #27272b;
  --text: #f5f5f7;
  --text-muted: #8b8b90;

  --accent: #4dd6a5;       /* 主强调色：薄荷绿 */
  --accent-soft: #8be9c9;
  --accent-2: #7c6cff;     /* 次强调色：紫色，用于标签/辅助点缀 */
  --danger: #ff6b6b;

  --font-display: "Work Sans", "Noto Sans SC", sans-serif;
  --font-body: "Work Sans", "Noto Sans SC", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  --radius: 12px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(560px circle at 12% -8%, rgba(77,214,165,0.10), transparent 60%),
    radial-gradient(480px circle at 100% 4%, rgba(124,108,255,0.09), transparent 55%),
    var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-soft); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ---------- 布局容器 ---------- */
.wrap {
  max-width: 840px;
  margin: 0 auto;
  padding: 0 24px 96px;
}

/* ---------- 视图切换标签栏 ---------- */
.view-tabs {
  display: inline-flex;
  gap: 4px;
  margin-top: 24px;
  padding: 4px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
}
.view-tab {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  padding: 7px 18px;
  border-radius: 999px;
  transition: background 0.15s ease, color 0.15s ease;
  cursor: pointer;
}
.view-tab:hover { color: var(--text); text-decoration: none; }
.view-tab.is-active {
  background: var(--accent);
  color: var(--bg-deep);
  font-weight: 600;
}

/* ---------- Hero ---------- */
.hero {
  padding: 56px 0 32px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 8px;
  position: relative;
  overflow: visible;
}

.hero__decor {
  position: absolute;
  top: 10px;
  left: 130px;
  width: 260px;
  height: 260px;
  overflow: visible;
  pointer-events: none;
  z-index: 0;
}
.hero__decor svg {
  display: block;
  width: 100%;
  height: 100%;
  transition: filter 0.3s ease;
  transform-origin: center;
}
.decor-active .hero__decor svg {
  animation: decor-hue 3s linear infinite;
}
@keyframes decor-hue {
  from { filter: hue-rotate(0deg); }
  to   { filter: hue-rotate(360deg); }
}

.hero__decor circle {
  transform-box: fill-box;
  transform-origin: center;
  transition: transform 0.08s linear; /* 音频驱动时让缩放过渡更顺滑 */
}
.site-playing .hero__decor .ring-1 { animation: ring-spin-cw  2s linear infinite; animation-delay: 0s; }
.site-playing .hero__decor .ring-2 { animation: ring-spin-ccw 2s linear infinite; animation-delay: 1s; }
.site-playing .hero__decor .ring-3 { animation: ring-spin-cw  2s linear infinite; animation-delay: 2s; }
.site-playing .hero__decor .ring-4 { animation: ring-spin-ccw 2s linear infinite; animation-delay: 3s; }

/* 音频实时跳动模式下，交给 JS 逐帧控制缩放，停用固定节奏动画 */
.beat-reactive .hero__decor circle { animation: none !important; }

@keyframes ring-spin-cw {
  0%   { transform: rotate(0deg)   scale(1); }
  50%  { transform: rotate(180deg) scale(1.55); }
  100% { transform: rotate(360deg) scale(1); }
}
@keyframes ring-spin-ccw {
  0%   { transform: rotate(0deg)    scale(1); }
  50%  { transform: rotate(-180deg) scale(1.55); }
  100% { transform: rotate(-360deg) scale(1); }
}
@media (max-width: 640px) {
  .hero__decor { width: 170px; height: 170px; top: 8px; left: auto; right: 8px; }
}

.hero__eyebrow {
  position: relative;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent-2);
  display: block;
  margin-bottom: 18px;
}

.hero__title {
  position: relative;
  z-index: 1;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.015em;
  font-size: clamp(28px, 4.5vw, 42px);
  line-height: 1.14;
  margin: 0 0 14px;
  color: var(--text);
}

.hero__title em {
  font-style: normal;
  color: var(--accent);
}

.hero__subtitle {
  position: relative;
  z-index: 1;
  color: var(--text-muted);
  font-size: 15px;
  max-width: 48ch;
  margin: 0;
}

.hero__meta {
  position: relative;
  z-index: 1;
  margin-top: 26px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  gap: 20px;
}

/* ---------- 搜索条 ---------- */
.searchbar {
  margin: 28px 0 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 999px;
  padding: 12px 18px;
  transition: border-color 0.15s ease;
}
.searchbar:focus-within { border-color: var(--accent); }
.searchbar svg { flex: none; opacity: 0.55; }
.searchbar input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14px;
}
.searchbar input::placeholder { color: var(--text-muted); }

/* ---------- 曲目列表 ---------- */
.tracklist {
  margin-top: 10px;
  border-top: 1px solid var(--line);
}

.track-wrapper {
  border-bottom: 1px solid var(--line);
}

.track {
  display: grid;
  grid-template-columns: 36px 56px 1fr auto;
  align-items: center;
  gap: 16px;
  padding: 14px 8px;
  border-radius: 8px;
  position: relative;
  transition: background 0.15s ease;
}
.track:hover { background: rgba(255,255,255,0.045); }

.track__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  text-align: right;
}

.track__cover {
  width: 56px;
  height: 56px;
  border-radius: 8px;
  background: var(--surface-2);
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  overflow: hidden;
}
.track__cover svg { opacity: 0.45; }

.track__info { min-width: 0; }
.track__title {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.track__artist {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 3px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.track__note {
  font-size: 12px;
  color: var(--accent-soft);
  margin-top: 4px;
}

.track__right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.02em;
  color: var(--accent-2);
  background: rgba(124,108,255,0.14);
  border: none;
  border-radius: 999px;
  padding: 4px 12px;
  white-space: nowrap;
}

.playlink, .playbtn {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: none;
  background: var(--surface-2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  flex: none;
  cursor: pointer;
  padding: 0;
  transition: background 0.15s ease, color 0.15s ease, transform 0.1s ease;
}
.playlink:hover, .playbtn:hover {
  background: var(--accent);
  color: var(--bg-deep);
  text-decoration: none;
  transform: scale(1.05);
}
.playbtn.is-playing {
  background: var(--accent);
  color: var(--bg-deep);
}

.track__player {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.3s ease;
  padding: 0 4px;
  grid-column: 1 / -1;
}
.track__player.open {
  max-height: 200px;
  padding: 0 4px 16px 4px;
  margin-left: 104px;
}
.track__player.open.track__player--video {
  max-height: none;
  margin-left: 0;
  margin-top: 14px;
  margin-bottom: 22px;
  padding: 0;
}
.track__player iframe {
  width: 100%;
  border: none;
  border-radius: 8px;
  display: block;
}
.track__player audio {
  width: 100%;
  display: block;
  height: 40px;
  border-radius: 8px;
  filter: invert(0.9) hue-rotate(140deg) saturate(0.6);
}

/* ---------- 视频宽屏播放卡 ---------- */
.video-frame {
  position: relative;
  border-radius: 16px;
  padding: 2px;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
}
.video-frame__inner {
  border-radius: 14px;
  overflow: hidden;
  background: #000;
  box-shadow: 0 28px 56px -20px rgba(0,0,0,0.7);
}
.video-player {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background: #000;
  display: block;
}
.video-caption {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  padding: 0 2px;
}
.video-caption__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex: none;
  animation: pulse-dot 1.6s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}
.video-caption__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.empty {
  padding: 60px 4px;
  text-align: center;
  color: var(--text-muted);
}
.empty strong { color: var(--text); display: block; font-family: var(--font-display); font-size: 20px; font-weight: 700; margin-bottom: 8px; }

.footer {
  margin-top: 48px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  text-align: center;
}

/* =========================================================
   Admin 页面
   ========================================================= */
.admin-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
}
.admin-card h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  margin: 0 0 16px;
  color: var(--accent-soft);
}
.field {
  margin-bottom: 14px;
}
.field label {
  display: block;
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--text-muted);
  margin-bottom: 6px;
}
.field input, .field textarea {
  width: 100%;
  background: var(--bg-deep);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 12px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14px;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--accent); }
.field textarea { resize: vertical; min-height: 60px; }
.field-row { display: flex; gap: 12px; }
.field-row .field { flex: 1; }
.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent);
  color: #05140d;
  border: none;
  border-radius: 999px;
  padding: 10px 20px;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  transition: filter 0.15s ease, transform 0.1s ease;
}
.btn:hover { filter: brightness(1.08); transform: translateY(-1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.btn--ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line);
}
.btn--danger {
  background: var(--danger);
  color: #2a0a0a;
}
.btn--sm { padding: 6px 14px; font-size: 12px; }

.status {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 10px 14px;
  border-radius: 8px;
  margin: 14px 0;
}
.status--ok { background: rgba(77,214,165,0.14); color: var(--accent); border: 1px solid var(--accent); }
.status--err { background: rgba(255,107,107,0.14); color: var(--danger); border: 1px solid var(--danger); }
.status--pending { background: rgba(124,108,255,0.14); color: var(--accent-2); border: 1px solid var(--accent-2); }

.admin-song {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: start;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.admin-song__title { font-family: var(--font-display); font-weight: 600; font-size: 16px; }
.admin-song__meta { font-size: 12px; color: var(--text-muted); margin-top: 2px; }
.admin-song__actions { display: flex; gap: 8px; }

.hidden { display: none !important; }

.top-nav {
  padding: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
}