:root {
  color-scheme: dark;
  --ink: #090a09;
  --ink-raised: #101210;
  --ink-soft: #171a17;
  --paper: #ece4d1;
  --paper-muted: #aaa89d;
  --gold: #d8b96b;
  --gold-bright: #edcf82;
  --mist: #a9c1bd;
  --status-text: #aeb0a8;
  --control-secondary-text: #9b9d96;
  --controls-surface: #0f110f;
  --controls-surface-dim: #0a0b0a;
  --controls-border: #34372f;
  --controls-border-dim: #22251f;
  --progress-track: #6f726b;
  --hairline: rgba(224, 207, 164, 0.19);
  --control-font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --poem-font: "Songti SC", STSong, "Noto Serif CJK SC", "Source Han Serif SC", SimSun, serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  min-width: 0;
  background: var(--ink);
}

body {
  min-width: 0;
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  color: var(--paper);
  background:
    radial-gradient(circle at 50% -12%, rgba(103, 105, 83, 0.16), transparent 36rem),
    linear-gradient(180deg, #0b0d0b 0%, #070807 100%);
  font-family: var(--control-font);
  -webkit-font-smoothing: antialiased;
}

button,
input {
  font: inherit;
}

button {
  color: inherit;
}

button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--gold-bright);
  outline-offset: 4px;
}

/* 舞台顶在上、控制栏沉到页面最底部，中间的空档由 margin-top:auto 吸收 */
#player-shell {
  display: flex;
  width: min(100% - 32px, 1040px);
  min-height: 100dvh;
  flex-direction: column;
  margin-inline: auto;
  padding: clamp(20px, 5vh, 48px) 0 20px;
}

#stage-frame {
  position: relative;
  width: min(960px, 100%);
  aspect-ratio: 960 / 544;
  container-type: inline-size;
  margin-inline: auto;
  margin-block-end: 13px;
  overflow: hidden;
  border: 0;
  background: #050605;
  box-shadow:
    0 24px 70px rgba(0, 0, 0, 0.48),
    0 0 0 1px var(--hairline) inset;
  isolation: isolate;
}

#player-stage {
  position: absolute;
  top: 0;
  left: 0;
  width: 960px;
  height: 544px;
  overflow: hidden;
  transform: scale(var(--stage-scale, calc(100cqw / 960px)));
  transform-origin: top left;
  background:
    radial-gradient(ellipse at 50% 42%, rgba(183, 161, 105, 0.085), transparent 48%),
    radial-gradient(circle at 23% 74%, rgba(108, 138, 128, 0.035), transparent 28%),
    repeating-linear-gradient(7deg, rgba(255, 255, 255, 0.008) 0 1px, transparent 1px 5px),
    #070907;
}

#player-stage::before,
#player-stage::after {
  content: "";
  position: absolute;
  z-index: 4;
  left: 0;
  width: 100%;
  height: 112px;
  pointer-events: none;
}

#player-stage::before {
  top: 0;
  background: linear-gradient(180deg, #070907 8%, rgba(7, 9, 7, 0.88) 35%, transparent 100%);
}

#player-stage::after {
  bottom: 0;
  background: linear-gradient(0deg, #070907 8%, rgba(7, 9, 7, 0.88) 35%, transparent 100%);
}

.stage-glow {
  position: absolute;
  inset: 9% 18%;
  border-radius: 50%;
  background: rgba(204, 178, 109, 0.018);
  filter: blur(36px);
}

.stage-seal {
  position: absolute;
  right: 30px;
  bottom: 25px;
  z-index: 5;
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border: 1px solid rgba(141, 54, 42, 0.45);
  color: rgba(163, 65, 49, 0.52);
  font-family: var(--poem-font);
  font-size: 15px;
  transform: rotate(-3deg);
}

#poem-viewport {
  position: absolute;
  z-index: 2;
  inset: 0;
  overflow: hidden;
}

#poem-track {
  width: min(680px, 76%);
  margin-inline: auto;
  padding: 0 20px;
  will-change: transform;
}

/* ── 对拍排版（改这里前先读 README「与伴奏对拍」一节）──────────────
   伴奏 130.002 BPM，4/4 一小节 = 1.84611s；滚动 22px/s ⇒ 一小节 = 40.6144px。
   小节线时刻 = 1.7285 + k × 1.84611s。
   下面三个值是让 10 首诗的诗名朗读时刻**全部落在小节线上**的唯一解：
     行高 60.9216px = 1.5 小节/行  → 2 行与 4 行的周期差恰好 3 小节
     padding 41.714px             → 第 1 首落在第 6 小节线
     margin  72.612px             → 短诗周期 10 小节、长诗周期 13 小节
                                    （72.874 为理论值，按实测标题块高反解修正 −0.262px）
   纯间隔 = 41.714×2 + 72.874 = 156.30px ≈ 7.10s（参考视频中位 7.0s）
   动其中任何一个都会破坏对拍，浏览器验收里有断言守着。          */
.poem {
  min-height: 300px;
  padding: 41.714px 0;
  text-align: center;
}

.poem + .poem {
  margin-top: 72.612px;
}

.poem-title {
  margin: 0;
  color: var(--gold-bright);
  font-family: var(--poem-font);
  font-size: 38px;
  font-weight: 600;
  letter-spacing: 0.16em;
  line-height: 1.35;
  text-indent: 0.16em;
}

.poem-byline {
  margin: 18px 0 34px;
  color: var(--mist);
  font-family: var(--poem-font);
  font-size: 18px;
  letter-spacing: 0.26em;
  opacity: 0.78;
}

.poem-lines {
  margin: 0;
  color: var(--paper);
  font-family: var(--poem-font);
  font-size: 30px;
  letter-spacing: 0.11em;
  line-height: 60.9216px; /* 1.5 小节/行，见 .poem 上方推导 */
}

.poem-line {
  display: block;
  margin: 0;
}

#start-overlay {
  position: absolute;
  z-index: 7;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 64px;
  text-align: center;
  background:
    radial-gradient(ellipse at center, rgba(101, 91, 64, 0.13), transparent 49%),
    rgba(7, 9, 7, 0.965);
}

#start-overlay[hidden] {
  display: none;
}

.cover-ornament {
  display: flex;
  align-items: center;
  width: 180px;
  margin-bottom: 22px;
  color: rgba(205, 180, 116, 0.7);
}

.cover-ornament span {
  height: 1px;
  flex: 1;
  background: linear-gradient(90deg, transparent, currentColor);
}

.cover-ornament span:last-child {
  background: linear-gradient(90deg, currentColor, transparent);
}

.cover-ornament i {
  display: grid;
  width: 34px;
  height: 34px;
  margin: 0 12px;
  place-items: center;
  border: 1px solid currentColor;
  font-family: var(--poem-font);
  font-size: 15px;
  font-style: normal;
  transform: rotate(45deg);
}

.cover-ornament b {
  font-weight: 400;
  transform: rotate(-45deg);
}

.cover-kicker {
  margin: 0 0 14px;
  color: var(--mist);
  font-family: var(--poem-font);
  font-size: 15px;
  letter-spacing: 0.34em;
  text-indent: 0.34em;
}

#start-overlay h1 {
  margin: 0;
  color: var(--gold-bright);
  font-family: var(--poem-font);
  font-size: 48px;
  font-weight: 600;
  letter-spacing: 0.24em;
  line-height: 1.25;
  text-indent: 0.24em;
}

.cover-meta {
  display: flex;
  gap: 10px;
  align-items: center;
  margin: 22px 0 30px;
  color: #999b91;
  font-size: 13px;
  letter-spacing: 0.12em;
}

#start-button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  gap: 11px;
  padding: 0 23px;
  border: 1px solid rgba(225, 196, 121, 0.55);
  border-radius: 1px;
  color: #f1ddb0;
  background: rgba(207, 177, 105, 0.065);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.22);
  cursor: pointer;
  font-family: var(--poem-font);
  font-size: 16px;
  letter-spacing: 0.16em;
  transition: color 180ms ease, background-color 180ms ease, border-color 180ms ease;
}

#start-button:hover {
  border-color: rgba(239, 208, 128, 0.88);
  color: #fff0c8;
  background: rgba(207, 177, 105, 0.13);
}

/* SVG 是替换元素，不给尺寸会取 300×150 默认值把按钮文字挤成竖排 */
.start-mark {
  width: 15px;
  height: 15px;
  flex: none;
}

#player-controls {
  display: grid;
  grid-template-columns: minmax(150px, 0.85fr) auto minmax(280px, 1.65fr);
  gap: 22px;
  align-items: center;
  width: min(960px, 100%);
  min-height: 76px;
  margin: auto auto 0;
  padding: 12px 16px;
  border-block: 1px solid var(--controls-border);
  background: var(--controls-surface);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.2);
  transition: background-color 250ms ease, border-color 250ms ease, box-shadow 250ms ease;
}

#player-controls.is-dim {
  border-color: var(--controls-border-dim);
  background: var(--controls-surface-dim);
  box-shadow: none;
}

#player-controls.is-dim:hover,
#player-controls.is-dim:focus-within {
  border-color: var(--controls-border);
  background: var(--controls-surface);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.2);
}

.now-reading {
  min-width: 0;
}

.info-label {
  display: block;
  margin-bottom: 3px;
  color: var(--control-secondary-text);
  font-size: 10px;
  letter-spacing: 0.2em;
}

#current-poem {
  display: block;
  overflow: hidden;
  color: var(--paper);
  font-family: var(--poem-font);
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.transport {
  display: flex;
  gap: 8px;
  align-items: center;
}

.icon-button,
.text-button {
  display: inline-flex;
  height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(217, 199, 152, 0.2);
  color: #c8c3b3;
  background: transparent;
  cursor: pointer;
  transition: color 160ms ease, border-color 160ms ease, background-color 160ms ease;
}

.icon-button {
  width: 44px;
  border-radius: 50%;
}

.text-button {
  gap: 8px;
  min-width: 72px;
  padding: 0 12px;
  border-radius: 22px;
  font-size: 12px;
}

/* 统一图标族：传输控件（播放/暂停）用实心，辅助控件（重播/音乐）用 1.6 描边 */
.icon {
  display: block;
  width: 20px;
  height: 20px;
  flex: none;
}

#play-toggle .icon-pause,
#play-toggle[aria-pressed="true"] .icon-play {
  display: none;
}

#play-toggle[aria-pressed="true"] .icon-pause {
  display: block;
}

.icon-slash {
  display: none;
}

.icon-button:hover,
.text-button:hover {
  border-color: rgba(232, 205, 136, 0.58);
  color: var(--gold-bright);
  background: rgba(213, 187, 120, 0.055);
}

/* 静音态必须在窄屏也可辨认：那里「有声/静音」文字被隐藏，
   只剩 ♫ 图标，所以状态改由颜色 + 斜杠承担。 */
#music-toggle[aria-pressed="false"] {
  color: var(--control-secondary-text);
  border-color: var(--controls-border-dim);
}

#music-toggle[aria-pressed="false"] .icon-slash {
  display: block;
}

.timeline {
  display: grid;
  grid-template-columns: minmax(100px, 1fr) auto;
  gap: 16px;
  align-items: center;
  min-width: 0;
}

.progress-wrap {
  position: relative;
  min-width: 0;
}

/* 十首诗在时间轴上的位置，由 player.js 按各自触发时刻写入 */
#progress-marks {
  position: absolute;
  top: 50%;
  right: 9px;
  left: 9px;
  height: 0;
  pointer-events: none;
}

.progress-mark {
  position: absolute;
  top: -5px;
  width: 1px;
  height: 10px;
  background: rgba(224, 207, 164, 0.34);
}

#progress {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 44px;
  margin: 0;
  appearance: none;
  background: transparent;
  cursor: pointer;
  touch-action: manipulation;
}

/* 已播段落用暖金，未播用中性轨道色，让进度一眼可读 */
#progress::-webkit-slider-runnable-track {
  height: 2px;
  background:
    linear-gradient(to right, var(--gold) 0 var(--played, 0%), transparent var(--played, 0%))
    , var(--progress-track);
}

#progress::-moz-range-track {
  height: 2px;
  background:
    linear-gradient(to right, var(--gold) 0 var(--played, 0%), transparent var(--played, 0%))
    , var(--progress-track);
}

#progress::-webkit-slider-thumb {
  width: 18px;
  height: 18px;
  margin-top: -8px;
  appearance: none;
  border: 0;
  border-radius: 50%;
  background: var(--gold-bright);
  box-shadow: 0 0 0 3px rgba(216, 185, 107, 0.12);
}

#progress::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border: 0;
  border-radius: 50%;
  background: var(--gold-bright);
  box-shadow: 0 0 0 3px rgba(216, 185, 107, 0.12);
}

#time-display {
  min-width: 76px;
  color: var(--control-secondary-text);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  text-align: right;
}

#status-message {
  min-height: 1.25em;
  margin: 9px auto 0;
  color: var(--status-text);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-align: center;
}

#bgm {
  display: none;
}

@media (max-width: 760px) {
  #player-shell {
    width: min(100% - 20px, 1040px);
    padding-top: 22px;
  }

  #player-controls {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px 14px;
    padding: 11px 10px;
  }

  .now-reading {
    grid-column: 1;
  }

  .transport {
    grid-column: 2;
    grid-row: 1;
  }

  .timeline {
    grid-column: 1 / -1;
  }
}

@media (max-width: 440px) {
  #player-shell {
    width: min(100% - 12px, 1040px);
    padding-top: 15px;
  }

  #player-controls {
    margin-top: auto;
  }

  .text-button {
    min-width: 38px;
    padding-inline: 8px;
  }

  .text-button span:last-child {
    display: none;
  }

  #time-display {
    min-width: 69px;
    font-size: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* ── 全屏播放 ───────────────────────────────────────────────
   注意：iOS Safari 不支持对非 <video> 元素调用 Fullscreen API，
   那里靠「添加到主屏幕」+ apple-mobile-web-app-capable 达到全屏。 */
#fullscreen-toggle .icon-exit-fs,
#fullscreen-toggle[aria-pressed="true"] .icon-enter-fs {
  display: none;
}

#fullscreen-toggle[aria-pressed="true"] .icon-exit-fs {
  display: block;
}

#player-shell:fullscreen,
#player-shell:-webkit-full-screen {
  width: 100%;
  max-width: none;
  padding: 0 0 12px;
  background: var(--ink);
}

/* 全屏时让舞台在高度允许范围内尽量放大，仍保持 960:544 */
#player-shell:fullscreen #stage-frame,
#player-shell:-webkit-full-screen #stage-frame {
  width: min(100%, calc((100dvh - 108px) * 960 / 544));
  margin-block-end: 0;
}

#player-shell:fullscreen #player-controls,
#player-shell:-webkit-full-screen #player-controls {
  width: min(960px, 100% - 24px);
}

/* 夜读浮尘：位于诗文(z-index 2)之下，纯装饰、不接收指针事件 */
#ambience {
  position: absolute;
  z-index: 1;
  top: 0;
  left: 0;
  width: 960px;
  height: 544px;
  pointer-events: none;
}

#ambience[hidden] {
  display: none;
}

@media (prefers-reduced-motion: reduce) {
  #ambience {
    display: none;
  }
}