/* ==========================================================================
   248 呼吸法 · 完整版样式
   - 深色主题，配色随当前阶段（--accent）整体过渡
   - body.compact 为极简布局：窗口缩小或手动切换时只保留运行必需信息
   ========================================================================== */

/* 注册为可过渡的自定义属性，阶段切换时配色平滑过渡 */
@property --accent { syntax: '<color>'; inherits: true; initial-value: #4cc2ff; }

:root{
  --accent: #4cc2ff;                 /* 当前阶段主题色，由脚本动态切换 */
  --bg: #070b16;
  --card: rgba(255,255,255,.045);
  --card-brd: rgba(255,255,255,.09);
  --txt: #e9eefc;
  --txt-dim: #8d9cbb;
  --txt-dim2: #67748f;
  transition: --accent .6s ease;
}

*{ box-sizing: border-box; }
html, body{ height: 100%; }
body{
  margin: 0;
  background: var(--bg);
  color: var(--txt);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ============ 背景氛围光（随呼吸脉动） ============ */
.ambient{
  position: fixed; inset: -20% -10%;
  pointer-events: none;
  opacity: .13;
  background: radial-gradient(circle at 32% 38%,
              color-mix(in srgb, var(--accent) 70%, transparent) 0%,
              transparent 55%);
  filter: blur(30px);
  transition: opacity .5s ease;
  z-index: 0;
}

.wrap{
  position: relative; z-index: 1;
  max-width: 1060px;
  margin: 0 auto;
  padding: 30px 20px 56px;
}

/* ============ 布局切换按钮 ============ */
.mode-btn{
  position: fixed; top: 14px; right: 14px; z-index: 6;
  padding: 7px 13px;
  font-size: 12px;
  border-radius: 10px;
  opacity: .7;
}
.mode-btn:hover{ opacity: 1; }

/* ============ 顶部标题 ============ */
header{ text-align: center; margin-bottom: 26px; }
h1{
  margin: 0;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: .16em;
}
.sub{
  margin: 8px 0 0;
  font-size: 12.5px;
  color: var(--txt-dim2);
  letter-spacing: .22em;
}
.ratio-badge{
  display: inline-flex; align-items: center; gap: 7px;
  margin-top: 14px; padding: 5px 14px;
  border: 1px solid var(--card-brd);
  border-radius: 999px;
  background: var(--card);
  font-size: 12px;
  color: var(--txt-dim);
  font-variant-numeric: tabular-nums;
}
.ratio-badge i{
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  transition: background .6s ease, box-shadow .6s ease;
}

/* ============ 主栅格 ============ */
.grid{
  display: grid;
  gap: 26px;
  grid-template-columns: minmax(0, 1.25fr) minmax(300px, .95fr);
  align-items: start;
}

/* ============ 呼吸舞台 ============ */
.stage{
  position: relative;
  width: min(368px, 76vw);
  aspect-ratio: 1 / 1;
  margin: 4px auto 0;
}
.stage svg{ position: absolute; inset: 0; width: 100%; height: 100%; transform: rotate(-90deg); }
.track{ fill: none; stroke: rgba(255,255,255,.055); stroke-width: 8; }
.ticks{ fill: none; stroke: rgba(255,255,255,.13); stroke-width: 1.5; stroke-dasharray: 1 9; }
.ring{
  fill: none;
  stroke: var(--accent);
  stroke-width: 8;
  stroke-linecap: round;
  filter: drop-shadow(0 0 9px color-mix(in srgb, var(--accent) 60%, transparent));
  transition: stroke .6s ease;
}

/* 呼吸球：由脚本逐帧改写 scale */
.orb{
  position: absolute; left: 50%; top: 50%;
  width: 64%; aspect-ratio: 1 / 1;
  border-radius: 50%;
  transform: translate(-50%,-50%) scale(.64);
  will-change: transform;
  background: radial-gradient(circle at 34% 27%,
              color-mix(in srgb, var(--accent) 88%, #ffffff 12%) 0%,
              color-mix(in srgb, var(--accent) 52%, #0a1526) 46%,
              #08111f 100%);
  box-shadow:
    0 0 70px color-mix(in srgb, var(--accent) 42%, transparent),
    inset 0 0 46px rgba(255,255,255,.07);
  transition: box-shadow .6s ease;
}
/* 待机时的轻微呼吸感 */
.stage.idle .orb{ animation: idlePulse 5.5s ease-in-out infinite; }
@keyframes idlePulse{
  0%,100%{ transform: translate(-50%,-50%) scale(.62); }
  50%    { transform: translate(-50%,-50%) scale(.72); }
}

.orb-text{
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  pointer-events: none;
  text-align: center;
}
.phase-name{
  font-size: 15px; font-weight: 600;
  letter-spacing: .34em; text-indent: .34em;
  color: #ffffff;
  text-shadow: 0 2px 14px rgba(0,0,0,.5);
}
.countdown{
  margin: 2px 0 0;
  font-size: 58px; font-weight: 300; line-height: 1.05;
  font-variant-numeric: tabular-nums;
  color: #ffffff;
  text-shadow: 0 4px 24px rgba(0,0,0,.55);
}
.phase-tip{
  margin-top: 4px;
  max-width: 72%;
  font-size: 12px; line-height: 1.5;
  color: rgba(255,255,255,.68);
}

/* ============ 时间轴进度条 ============ */
.timeline{
  display: flex; gap: 6px;
  margin: 26px 0 0;
  height: 54px;
}
.seg{
  position: relative;
  flex: 1 1 0; min-width: 74px;
  border-radius: 12px;
  background: rgba(255,255,255,.035);
  border: 1px solid var(--card-brd);
  overflow: hidden;
  transition: border-color .35s ease, background .35s ease;
}
.seg-fill{
  position: absolute; inset: 0;
  transform-origin: left center;
  transform: scaleX(0);
  background: linear-gradient(90deg,
              color-mix(in srgb, var(--seg-color) 30%, transparent),
              color-mix(in srgb, var(--seg-color) 62%, transparent));
}
.seg-body{
  position: relative;
  height: 100%;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 2px;
}
.seg-name{ font-size: 12.5px; color: var(--txt-dim); transition: color .3s ease; }
.seg-dur{ font-size: 11px; color: var(--txt-dim2); font-variant-numeric: tabular-nums; }
.seg.done .seg-name{ color: var(--txt-dim2); }
.seg.active{
  border-color: color-mix(in srgb, var(--seg-color) 62%, transparent);
  background: color-mix(in srgb, var(--seg-color) 9%, transparent);
  box-shadow: 0 0 22px color-mix(in srgb, var(--seg-color) 22%, transparent);
}
.seg.active .seg-name{ color: #fff; font-weight: 600; }
.seg.active .seg-dur{ color: rgba(255,255,255,.72); }

/* ============ 控制按钮 ============ */
.controls{
  display: flex; gap: 12px; justify-content: center;
  margin-top: 22px;
}
button{
  font-family: inherit; cursor: pointer;
  border-radius: 12px;
  border: 1px solid var(--card-brd);
  background: var(--card);
  color: var(--txt);
  font-size: 14px;
  padding: 12px 22px;
  transition: transform .12s ease, background .2s ease, border-color .2s ease, opacity .2s ease;
  -webkit-tap-highlight-color: transparent;
}
button:hover{ background: rgba(255,255,255,.085); }
button:active{ transform: scale(.97); }
button:disabled{ opacity: .35; cursor: not-allowed; }
.btn-primary{
  min-width: 132px;
  font-weight: 600;
  border-color: transparent;
  background: var(--accent);
  color: #06121f;
  box-shadow: 0 8px 26px color-mix(in srgb, var(--accent) 34%, transparent);
  transition: transform .12s ease, background .6s ease, box-shadow .6s ease;
}
.btn-primary:hover{ background: color-mix(in srgb, var(--accent) 88%, #ffffff); }

/* ============ 统计与提示 ============ */
.stats{
  display: flex; justify-content: center; gap: 34px;
  margin-top: 20px;
  font-size: 12.5px; color: var(--txt-dim2);
}
.stats b{
  display: block; margin-top: 3px;
  font-size: 17px; font-weight: 600; color: var(--txt);
  font-variant-numeric: tabular-nums;
}
.hint{
  margin-top: 18px; text-align: center;
  font-size: 11.5px; color: var(--txt-dim2);
  letter-spacing: .04em;
}
kbd{
  font-family: inherit; font-size: 11px;
  padding: 1px 6px; margin: 0 2px;
  border: 1px solid var(--card-brd);
  border-bottom-width: 2px;
  border-radius: 5px;
  background: rgba(255,255,255,.05);
  color: var(--txt-dim);
}

/* ============ 设置面板 ============ */
.panel{
  padding: 20px;
  border: 1px solid var(--card-brd);
  border-radius: 16px;
  background: var(--card);
  backdrop-filter: blur(10px);
}
.panel h2{
  margin: 0 0 4px;
  font-size: 13px; font-weight: 600;
  letter-spacing: .14em;
}
.panel .panel-sub{
  margin: 0 0 18px;
  font-size: 11.5px; color: var(--txt-dim2);
}
.presets{ display: flex; gap: 8px; margin-bottom: 20px; flex-wrap: wrap; }
.presets button{
  flex: 1 1 auto;
  padding: 8px 10px;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}
.presets button.on{
  border-color: color-mix(in srgb, var(--accent) 60%, transparent);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: #fff;
}

.field{ margin-bottom: 17px; }
.field-head{
  display: flex; align-items: center; gap: 8px;
  margin-bottom: 7px;
  font-size: 12.5px;
}
.field-head .dot{
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--fcolor);
  box-shadow: 0 0 8px var(--fcolor);
}
.field-head .fval{
  margin-left: auto;
  font-variant-numeric: tabular-nums;
  color: var(--fcolor);
  font-weight: 600;
}
input[type=range]{
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 4px;
  border-radius: 999px;
  background: rgba(255,255,255,.1);
  outline: none;
}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance: none; appearance: none;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--fcolor);
  border: none;
  box-shadow: 0 0 12px var(--fcolor);
  cursor: pointer;
}
input[type=range]::-moz-range-thumb{
  width: 16px; height: 16px; border: none; border-radius: 50%;
  background: var(--fcolor);
  box-shadow: 0 0 12px var(--fcolor);
  cursor: pointer;
}

.row{
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  font-size: 12.5px;
  color: var(--txt-dim);
  border-top: 1px solid rgba(255,255,255,.055);
}
.row:first-of-type{ border-top: none; }
.row input[type=number]{
  width: 68px;
  padding: 6px 9px;
  font-family: inherit; font-size: 12.5px;
  color: var(--txt);
  background: rgba(0,0,0,.3);
  border: 1px solid var(--card-brd);
  border-radius: 8px;
  outline: none;
  font-variant-numeric: tabular-nums;
}
.switch{ position: relative; width: 40px; height: 22px; flex: 0 0 auto; }
.switch input{ position: absolute; opacity: 0; width: 100%; height: 100%; margin: 0; cursor: pointer; }
.switch span{
  position: absolute; inset: 0;
  border-radius: 999px;
  background: rgba(255,255,255,.12);
  transition: background .22s ease;
  pointer-events: none;
}
.switch span::after{
  content: "";
  position: absolute; top: 3px; left: 3px;
  width: 16px; height: 16px; border-radius: 50%;
  background: #cfd8ea;
  transition: transform .22s ease, background .22s ease;
}
.switch input:checked + span{ background: color-mix(in srgb, var(--accent) 65%, transparent); }
.switch input:checked + span::after{ transform: translateX(18px); background: #fff; }

/* 练习进行中锁定设置 */
.panel[data-locked="1"] .presets button,
.panel[data-locked="1"] input{ opacity: .45; }
.lock-note{
  display: none;
  margin-top: 14px;
  padding: 9px 12px;
  border-radius: 10px;
  font-size: 11.5px;
  color: #ffd58a;
  background: rgba(255,196,84,.09);
  border: 1px solid rgba(255,196,84,.2);
}
.panel[data-locked="1"] .lock-note{ display: block; }

/* ==========================================================================
   极简布局：窗口缩小或手动切换时启用，只保留运行必需信息
   （阶段名 / 倒计时 / 进度环 / 时间轴 / 主控按钮）
   ========================================================================== */
body.compact .wrap{ max-width: 560px; padding: 14px 14px 18px; }
body.compact header{ margin-bottom: 10px; }
body.compact h1{ font-size: 15px; letter-spacing: .12em; }
body.compact .sub,
body.compact .ratio-badge,
body.compact .stats,
body.compact .hint,
body.compact aside.panel{ display: none; }

body.compact .grid{ grid-template-columns: 1fr; gap: 0; }

/* 舞台尺寸同时受高度与宽度约束，窗口压扁时也不会溢出 */
body.compact .stage{ width: min(46vh, 58vw, 250px); margin-top: 0; }
body.compact .phase-name{ font-size: 12px; letter-spacing: .24em; text-indent: .24em; }
body.compact .countdown{ font-size: 42px; }
body.compact .phase-tip{ display: none; }

body.compact .timeline{ height: 8px; margin-top: 14px; gap: 4px; }
body.compact .timeline .seg{ border-radius: 4px; min-width: 0; }
body.compact .timeline .seg-body{ display: none; }

body.compact .controls{ margin-top: 14px; gap: 8px; }
body.compact .controls button{ padding: 9px 16px; font-size: 13px; }
body.compact .btn-primary{ min-width: 104px; }
body.compact #btnSkip{ display: none; }
body.compact .mode-btn{ top: 8px; right: 8px; padding: 5px 10px; font-size: 11px; }

/* 窗口极窄时进一步收紧 */
@media (max-width: 420px){
  body.compact .wrap{ padding: 10px 10px 14px; }
  body.compact .stage{ width: min(42vh, 72vw, 210px); }
  body.compact .countdown{ font-size: 34px; }
}

/* 完整布局在窄窗口下的基础自适应 */
@media (max-width: 880px){
  .grid{ grid-template-columns: 1fr; }
  .stage{ margin-top: 0; }
  .wrap{ padding-top: 22px; }
}