/* ==========================================================================
   夜读 · 每晚一篇
   设计方向：台灯下的纸。夜色为默认光线，暖白字，灯色只用在一处。
   唯一放大的元素 —— 章节序号（内容本身真有 1/2/3 的顺序）。
   ========================================================================== */

:root{
  /* 夜（默认） */
  --bg:#171A1E;
  --bg-2:#1E2228;
  --panel:#1B1F24;
  --fg:#E7E2D9;
  --fg-2:#9AA2AB;
  --fg-3:#828A93;
  --line:rgba(231,226,217,.13);
  --line-2:rgba(231,226,217,.07);
  --lamp:#D8A24A;
  --lamp-soft:rgba(216,162,74,.14);
  --shadow:0 20px 50px -24px rgba(0,0,0,.8);

  --serif:"Source Han Serif SC","Noto Serif SC","Songti SC","STSong","SimSun",Georgia,serif;
  --sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Hiragino Sans GB",Inter,system-ui,-apple-system,"Segoe UI",sans-serif;
  --read:var(--sans);

  --fs:17.5px;
  --lh:2.0;
  --col:640px;
}

html[data-face="serif"]{--read:var(--serif)}

html[data-theme="day"]{
  --bg:#FBFAF7; --bg-2:#F2F1EC; --panel:#FFFFFF;
  --fg:#22252A; --fg-2:#5F6772; --fg-3:#6B737C;
  --line:rgba(34,37,42,.13); --line-2:rgba(34,37,42,.07);
  --lamp:#8A6209; --lamp-soft:rgba(138,98,9,.10);
  --shadow:0 20px 50px -26px rgba(30,33,38,.4);
}
html[data-theme="sepia"]{
  --bg:#F4EFE4; --bg-2:#EBE5D7; --panel:#FAF6ED;
  --fg:#312D26; --fg-2:#635B4C; --fg-3:#6E6555;
  --line:rgba(49,45,38,.15); --line-2:rgba(49,45,38,.08);
  --lamp:#8A6420; --lamp-soft:rgba(138,100,32,.13);
  --shadow:0 20px 50px -26px rgba(80,70,50,.35);
}

*{box-sizing:border-box}
[hidden]{display:none !important}
html,body{margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg); color:var(--fg);
  font-family:var(--sans);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  transition:background .35s ease,color .35s ease;
}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid var(--lamp);outline-offset:3px;border-radius:2px}

/* ---------- 顶部：进度即一条灯线 ---------- */
.rail{position:fixed;top:0;left:0;right:0;height:2px;z-index:60}
.rail i{display:block;height:100%;width:0;background:var(--lamp);opacity:.85}

/* ---------- 顶栏 ---------- */
.bar{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;gap:20px;
  height:58px;padding:0 26px;
  background:color-mix(in srgb,var(--bg) 84%,transparent);
  backdrop-filter:saturate(150%) blur(16px);
  border-bottom:1px solid var(--line-2);
}
.wordmark{display:flex;align-items:baseline;gap:10px}
.wm-main{font-family:var(--serif);font-size:19px;font-weight:700;letter-spacing:.22em;color:var(--fg)}
.wm-sub{font-size:10px;letter-spacing:.24em;color:var(--fg-3)}
.bar-gap{flex:1}
.plain{
  font-size:13.5px;color:var(--fg-2);letter-spacing:.04em;
  padding:6px 2px;border-bottom:1px solid transparent;
  transition:color .18s ease,border-color .18s ease;
}
.plain:hover{color:var(--lamp);border-bottom-color:var(--lamp)}
.cnt{
  margin-left:7px;font-size:11px;font-variant-numeric:tabular-nums;
  color:var(--fg-3);letter-spacing:0;
}

/* ---------- 正文 ---------- */
.stage{padding:78px 26px 150px}
.sheet{max-width:var(--col);margin:0 auto;animation:enter .5s cubic-bezier(.2,.85,.3,1)}
@keyframes enter{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

.title{
  margin:0 0 18px;
  font-family:var(--serif);
  font-size:34px;font-weight:700;line-height:1.44;letter-spacing:.005em;
  text-align:left;
}
.meta{
  display:flex;align-items:center;flex-wrap:wrap;
  margin:0 0 52px;font-size:13px;color:var(--fg-3);
  font-variant-numeric:tabular-nums;letter-spacing:.02em;
}
.meta .sep{display:inline-block;width:1px;height:11px;background:var(--line);margin:0 12px}
.flag{margin-left:16px;font-style:normal;font-size:11.5px;letter-spacing:.14em;color:var(--lamp)}

.body{
  font-family:var(--read);
  font-size:var(--fs);line-height:var(--lh);color:var(--fg);
  text-align:justify;text-justify:inter-ideograph;
  overflow-wrap:anywhere;
}
.body p{margin:0 0 1.1em}
.body p:last-child{margin-bottom:0}
.body strong{font-weight:700}
.body em{font-style:normal;color:var(--lamp)}
.body blockquote{
  margin:1.8em 0;padding-left:16px;border-left:2px solid var(--lamp-soft);
  color:var(--fg-2);
}

/* 章节序号：整页唯一放大的东西 */
.body h3{
  position:relative;
  margin:3em 0 1.2em;
  font-family:var(--serif);
  font-size:calc(var(--fs) + 2px);font-weight:700;line-height:1.55;letter-spacing:.01em;
}
.body h3 i{
  font-style:normal;font-family:var(--serif);
  color:var(--lamp);font-weight:700;letter-spacing:.02em;
}
.body h3 + p{margin-top:0}

@media (min-width:980px){
  .body h3 i{
    position:absolute;left:-78px;top:-10px;
    font-size:52px;line-height:1;opacity:.3;letter-spacing:0;
  }
}
@media (max-width:979px){
  .body h3 i{display:block;font-size:13px;letter-spacing:.2em;opacity:.9;margin-bottom:8px}
}

/* 收尾记号：一条短灯线 */
.endmark{width:32px;height:1px;margin:64px auto 0;background:var(--lamp);opacity:.5}

/* ---------- 读完 ---------- */
.done{max-width:var(--col);margin:70px auto 0;text-align:center}
.done-num{
  margin:0 0 18px;font-family:var(--serif);font-size:56px;font-weight:700;
  line-height:1;color:var(--lamp);letter-spacing:.01em;
}
.done h2{margin:0 0 12px;font-size:19px;font-weight:600;letter-spacing:.02em}
.done-tip{margin:0 0 30px;font-size:13.5px;color:var(--fg-3)}
.btn-line{
  padding:11px 26px;border:1px solid var(--line);border-radius:8px;
  font-size:14px;color:var(--fg);transition:all .18s ease;
}
.btn-line:hover{border-color:var(--lamp);color:var(--lamp)}

/* ---------- 底栏 ---------- */
.dock{
  position:fixed;left:0;right:0;bottom:0;z-index:45;
  display:flex;
  background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:saturate(150%) blur(16px);
  border-top:1px solid var(--line);
  padding-bottom:env(safe-area-inset-bottom);
}
.act{
  flex:1;display:flex;align-items:center;justify-content:center;gap:8px;
  height:56px;font-size:14.5px;letter-spacing:.06em;color:var(--fg-2);
  transition:color .18s ease,background .18s ease;
}
.act + .act{border-left:1px solid var(--line-2)}
.act:hover{color:var(--lamp);background:var(--lamp-soft)}
.act:active{background:var(--lamp-soft)}
.act.on{color:var(--lamp)}
.act.on svg{opacity:1}

@media (min-width:981px){
  .dock{
    left:50%;transform:translateX(-50%);right:auto;
    width:var(--col);border:1px solid var(--line);border-bottom:0;
    border-radius:12px 12px 0 0;
  }
}

/* ---------- 目录 ---------- */
.scrim{position:fixed;inset:0;z-index:70;background:rgba(8,10,13,.55);backdrop-filter:blur(3px);animation:fade .22s ease}
.drawer{
  position:fixed;top:0;right:0;bottom:0;z-index:71;
  width:min(430px,94vw);
  display:flex;flex-direction:column;
  background:var(--panel);border-left:1px solid var(--line);
  box-shadow:var(--shadow);
  animation:slide .3s cubic-bezier(.2,.85,.3,1);
}
@keyframes slide{from{transform:translateX(18px);opacity:.6}to{transform:none;opacity:1}}
@keyframes fade{from{opacity:0}to{opacity:1}}

.dw-head{padding:20px 22px 0;border-bottom:1px solid var(--line)}
.dw-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.dw-title{font-family:var(--serif);font-size:17px;font-weight:700;letter-spacing:.16em}
.search{
  width:100%;height:38px;padding:0 2px;border:0;border-bottom:1px solid var(--line);
  background:none;color:var(--fg);font:inherit;font-size:13.5px;outline:none;
  transition:border-color .18s ease;
}
.search::placeholder{color:var(--fg-3)}
.search:focus{border-bottom-color:var(--lamp)}
.dw-tabs{display:flex;align-items:center;gap:20px;margin-top:14px}
.tab{
  padding:8px 0 13px;font-size:13px;color:var(--fg-3);letter-spacing:.06em;
  border-bottom:2px solid transparent;margin-bottom:-1px;
  transition:color .18s ease,border-color .18s ease;
}
.tab:hover{color:var(--fg)}
.tab.on{color:var(--lamp);border-bottom-color:var(--lamp)}
.dw-count{margin-left:auto;font-size:11.5px;color:var(--fg-3);font-variant-numeric:tabular-nums}

.dw-list{flex:1;overflow-y:auto;overscroll-behavior:contain;scrollbar-width:thin}
.dw-list::-webkit-scrollbar{width:8px}
.dw-list::-webkit-scrollbar-thumb{background:var(--line);border-radius:99px}
.grp{
  position:sticky;top:0;z-index:2;
  padding:14px 22px 8px;
  font-size:11px;letter-spacing:.2em;color:var(--fg-3);
  background:color-mix(in srgb,var(--panel) 93%,transparent);
  backdrop-filter:blur(8px);
}
.it{
  display:flex;align-items:center;gap:14px;width:100%;text-align:left;
  padding:14px 22px;border-bottom:1px solid var(--line-2);
  transition:background .15s ease;
}
.it:hover{background:var(--lamp-soft)}
.it .t{flex:1;min-width:0}
.it .t b{
  display:block;font-weight:400;font-size:14px;line-height:1.55;color:var(--fg);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.it .t s{
  display:block;text-decoration:none;margin-top:5px;
  font-size:11px;color:var(--fg-3);font-variant-numeric:tabular-nums;
}
.it.read .t b{color:var(--fg-3)}
.it .mk{flex:none;width:7px;height:7px;border-radius:50%;background:var(--line)}
.it.read .mk{background:var(--lamp)}
.it.cur{background:var(--lamp-soft)}
.dw-empty{padding:70px 24px;text-align:center;font-size:13.5px;color:var(--fg-3)}

/* ---------- 设置 ---------- */
.pop{
  position:fixed;top:66px;right:26px;z-index:80;
  width:300px;padding:8px 18px;
  background:var(--panel);border:1px solid var(--line);border-radius:12px;
  box-shadow:var(--shadow);animation:fade .2s ease;
}
.pop-row{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:14px 0;font-size:13.5px;
}
.pop-row + .pop-row{border-top:1px solid var(--line-2)}
.pop-row .k{color:var(--fg-2);letter-spacing:.04em}
.seg{display:flex;gap:2px}
.seg button{
  padding:6px 11px;font-size:12.5px;color:var(--fg-3);border-radius:6px;
  transition:all .16s ease;
}
.seg button:hover{color:var(--fg);background:var(--line-2)}
.seg button.on{color:var(--lamp);background:var(--lamp-soft);font-weight:600}
.sw{position:relative;display:inline-block;width:40px;height:23px;flex:none}
.sw input{position:absolute;opacity:0;width:0;height:0}
.sw i{position:absolute;inset:0;border-radius:99px;background:var(--line);transition:background .2s}
.sw i::after{
  content:"";position:absolute;top:3px;left:3px;width:17px;height:17px;border-radius:50%;
  background:var(--bg);transition:transform .2s;
}
html[data-theme="day"] .sw i::after,html[data-theme="sepia"] .sw i::after{background:#fff}
.sw input:checked + i{background:var(--lamp)}
.sw input:checked + i::after{transform:translateX(17px)}

/* ---------- toast ---------- */
.toast{
  position:fixed;left:50%;bottom:78px;transform:translateX(-50%);z-index:90;
  padding:10px 20px;border-radius:8px;font-size:13px;letter-spacing:.04em;
  background:var(--fg);color:var(--bg);
  animation:fade .2s ease;pointer-events:none;
}

/* ---------- 响应式 ---------- */
@media (max-width:720px){
  .bar{height:54px;padding:0 18px;gap:14px}
  .wm-sub{display:none}
  .stage{padding:38px 22px 130px}
  .title{font-size:25px;margin-bottom:14px}
  .meta{margin-bottom:34px}
  .body{--lh:1.92}
  .endmark{margin-top:48px}
  .pop{top:auto;bottom:0;left:0;right:0;width:auto;border-radius:14px 14px 0 0;padding:8px 20px calc(14px + env(safe-area-inset-bottom))}
  .drawer{width:100vw;border-left:0}
  .toast{bottom:72px}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}