/* 灯下书场：夜里一盏灯照着书桌的暗场。单一深色主题（刻意），琥珀色灯光是唯一强调色。
   布局：顶栏 + 居中单列内容区；书目用封面图卡片网格；播放器全屏覆盖。 */
:root{
  --ink:#121011; --desk:#1b1817; --desk-2:#24201e; --rule:#352f2b;
  --paper:#eee5d6; --muted:#a59887; --lamp:#e2aa5c; --lamp-ink:#1d1307;
  --ok:#7fbf8e; --bad:#e07a62;
  --f-title:"Noto Serif SC","Songti SC","STSong",serif;
  --f-body:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  color-scheme:dark;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--ink);color:var(--paper);font:15px/1.7 var(--f-body)}
[hidden]{display:none!important}
a{color:inherit}
button,input,textarea,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--lamp);outline-offset:2px}

.top{position:sticky;top:0;z-index:20;display:flex;align-items:center;gap:20px;flex-wrap:wrap;
  padding:12px max(16px,env(safe-area-inset-right,0px)) 12px max(16px,env(safe-area-inset-left,0px));
  padding-top:calc(12px + env(safe-area-inset-top,0px));
  background:rgba(18,16,17,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--rule)}
.brand{font-family:var(--f-title);font-weight:700;font-size:20px;letter-spacing:.12em;text-decoration:none;display:flex;align-items:center;gap:10px}
.lamp{width:12px;height:12px;border-radius:50%;background:var(--lamp);box-shadow:0 0 14px 4px rgba(226,170,92,.45)}
nav{display:flex;gap:4px;flex-wrap:wrap}
nav a{text-decoration:none;padding:6px 12px;border-radius:999px;color:var(--muted)}
nav a:hover{color:var(--paper)}
nav a.on{color:var(--paper);background:var(--desk-2)}
nav a.cta{color:var(--lamp)}
.who{margin-left:auto;display:flex;gap:10px;align-items:center;color:var(--muted);font-size:14px}
@media (max-width:640px){.top{gap:8px 12px}.top nav{order:3;width:100%}}

main{max-width:1100px;margin:0 auto;padding:32px max(16px,env(safe-area-inset-right,0px)) 80px max(16px,env(safe-area-inset-left,0px));display:flex;flex-direction:column;gap:28px}
h1,h2,h3{font-family:var(--f-title);font-weight:600;margin:0;text-wrap:balance}
h1{font-size:clamp(26px,3.4vw,36px);letter-spacing:.04em}
h2{font-size:20px}
.lede{color:var(--muted);max-width:62ch;margin:6px 0 0}
.empty{color:var(--muted);padding:40px 0}

.btn{border:1px solid var(--rule);background:var(--desk-2);border-radius:999px;padding:8px 18px;cursor:pointer}
.btn:hover{border-color:var(--lamp)}
.btn.primary{background:var(--lamp);color:var(--lamp-ink);border-color:var(--lamp);font-weight:500}
.btn.ghost{background:none}
.btn.small{padding:4px 12px;font-size:13px}
.btn.danger{color:var(--bad);border-color:rgba(224,122,98,.4)}
.btn:disabled{opacity:.5;cursor:default}

/* 经典书目 */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:20px}
.book{display:flex;flex-direction:column;background:var(--desk);border:1px solid var(--rule);border-radius:10px;overflow:hidden;cursor:pointer;text-decoration:none;transition:transform .2s,border-color .2s}
.book:hover{transform:translateY(-2px);border-color:rgba(226,170,92,.5)}
.book .cv{aspect-ratio:16/9;background:var(--desk-2) center/cover no-repeat;position:relative}
.book .cv::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(18,16,17,.85),transparent 55%)}
.book .meta{padding:12px 16px 16px;display:flex;flex-direction:column;gap:4px}
.book h3{font-size:18px}
.book .sub{color:var(--muted);font-size:13px;display:flex;gap:10px;flex-wrap:wrap}
.bar{height:3px;background:var(--rule);border-radius:2px;overflow:hidden}
.bar i{display:block;height:100%;background:var(--lamp)}

/* 书架 */
.shelf{display:flex;flex-direction:column;gap:12px}
.item{display:grid;grid-template-columns:160px minmax(0,1fr) auto;gap:16px;align-items:center;background:var(--desk);border:1px solid var(--rule);border-radius:10px;padding:12px}
.item .cv{aspect-ratio:16/9;border-radius:6px;background:var(--desk-2) center/cover no-repeat}
.item .info{display:flex;flex-direction:column;gap:6px;min-width:0}
.item h3{font-size:17px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.item .acts{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.chip{display:inline-block;font-size:12px;padding:1px 9px;border-radius:999px;border:1px solid currentColor;white-space:nowrap}
.chip.q{color:var(--muted)} .chip.w{color:var(--lamp)} .chip.d{color:var(--ok)} .chip.f{color:var(--bad)}
@media (max-width:640px){.item{grid-template-columns:96px minmax(0,1fr)}.item .acts{grid-column:1/-1;justify-content:flex-start}}

/* 生成表单 */
.form{display:flex;flex-direction:column;gap:22px;max-width:820px}
.field{display:flex;flex-direction:column;gap:8px}
.field>label,.field>.lbl{font-size:13px;letter-spacing:.06em;color:var(--muted)}
input[type=text],input:not([type]),input[type=password],textarea,select{background:var(--desk);border:1px solid var(--rule);border-radius:8px;padding:10px 12px;width:100%}
textarea{min-height:260px;resize:vertical;line-height:1.8}
.count{font-size:12px;color:var(--muted);text-align:right;font-variant-numeric:tabular-nums}
.count.over{color:var(--bad)}
.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
.tile{position:relative;border:1px solid var(--rule);border-radius:10px;padding:12px 12px 10px;cursor:pointer;background:var(--desk);display:flex;flex-direction:column;gap:6px}
.tile input{position:absolute;opacity:0;pointer-events:none}
.tile .sw{height:46px;border-radius:6px}
.tile b{font-weight:500}
.tile small{color:var(--muted);font-size:12px;line-height:1.5}
.tile:has(input:checked){border-color:var(--lamp);box-shadow:0 0 0 1px var(--lamp) inset}
.tile:has(input:focus-visible){outline:2px solid var(--lamp);outline-offset:2px}
.seg{display:flex;gap:8px;flex-wrap:wrap}
.seg .tile{flex:1 1 160px}
.check{display:flex;gap:10px;align-items:flex-start;color:var(--muted);font-size:14px}
.check input{margin-top:5px;accent-color:var(--lamp)}
.err{color:var(--bad);min-height:1.2em;margin:0;font-size:14px}
.note{color:var(--muted);font-size:13px;margin:0}

/* 登录弹窗 */
.modal{position:fixed;inset:0;z-index:50;background:rgba(0,0,0,.6);display:flex;align-items:center;justify-content:center;padding:16px}
.sheet{background:var(--desk);border:1px solid var(--rule);border-radius:12px;padding:24px;width:min(380px,100%);display:flex;flex-direction:column;gap:8px}
.sheet h2{margin-bottom:8px}
.sheet .row{display:flex;gap:8px;flex-wrap:wrap;margin-top:6px}

/* ---------- 播放器（全屏） ---------- */
#player{position:fixed;inset:0;z-index:40;background:#000;overflow:clip;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none}
#player .layer{position:absolute;inset:-2%;width:104%;height:104%;object-fit:cover;opacity:0;transition:opacity 1.6s ease;will-change:transform,opacity;pointer-events:none}
#player .layer.on{opacity:1}
#player canvas{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
#player .vig{position:absolute;inset:0;pointer-events:none;background:radial-gradient(ellipse at center,transparent 45%,rgba(0,0,0,.55) 100%),linear-gradient(to bottom,rgba(0,0,0,.4) 0%,transparent 18%,transparent 55%,rgba(0,0,0,.85) 100%)}
#player .ptop{position:absolute;top:calc(env(safe-area-inset-top,0px) + 12px);left:max(16px,env(safe-area-inset-left,0px));right:max(16px,env(safe-area-inset-right,0px));display:flex;gap:10px;align-items:center;z-index:5}
#player .ptop .t{font-size:13px;color:var(--muted)}
#player .ptop .cap{font-size:15px;padding:3px 10px;border-left:2px solid var(--lamp);background:rgba(0,0,0,.35)}
#player .ptop .sp{flex:1}
#player .pbtn{color:var(--paper);background:rgba(0,0,0,.4);border:1px solid rgba(255,255,255,.18);border-radius:999px;padding:6px 12px;cursor:pointer}
#player .pbtn:hover{border-color:var(--lamp)}
#player .sub{position:absolute;left:0;right:0;bottom:calc(env(safe-area-inset-bottom,0px) + 92px);padding:0 max(16px,8vw);text-align:center;z-index:4;pointer-events:none}
#player .sub .prev{font-size:clamp(14px,1.6vw,18px);color:rgba(238,229,214,.45);margin-bottom:8px;min-height:1.4em}
#player .sub .cur{font-family:var(--f-title);font-weight:600;font-size:clamp(19px,2.5vw,30px);line-height:1.55;text-shadow:0 2px 10px rgba(0,0,0,.9),0 0 2px #000}
#player .pbar{position:absolute;left:0;right:0;bottom:0;padding:10px max(16px,env(safe-area-inset-right,0px)) calc(env(safe-area-inset-bottom,0px) + 14px) max(16px,env(safe-area-inset-left,0px));z-index:6;display:flex;gap:10px;align-items:center;flex-wrap:wrap}
#player .prog{flex:1 1 100%;height:16px;position:relative;cursor:pointer;order:-1}
#player .prog .track{position:absolute;left:0;right:0;top:7px;height:3px;background:rgba(255,255,255,.18);border-radius:2px}
#player .prog .fill{position:absolute;left:0;top:7px;height:3px;background:var(--lamp);border-radius:2px}
#player .prog .tick{position:absolute;top:4px;width:2px;height:9px;background:rgba(255,255,255,.35)}
#player .time{font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}
#player .play{width:44px;height:44px;padding:0;font-size:18px;background:var(--lamp);color:var(--lamp-ink);border:none}
#player .panel{position:absolute;top:0;right:0;bottom:0;width:min(440px,100%);background:rgba(20,18,17,.97);z-index:8;transform:translateX(100%);transition:transform .35s ease;overflow-y:auto;
  padding:calc(env(safe-area-inset-top,0px) + 56px) 22px 120px;font-size:17px;line-height:1.9}
#player .panel.open{transform:none}
#player .panel p{margin:0 0 1em;color:#cfc5b4}
#player .panel span{cursor:pointer;border-radius:3px}
#player .panel span:hover{background:rgba(226,170,92,.15)}
#player .panel span.cur{color:#fff;background:rgba(226,170,92,.28)}
#player .panel h4{font-size:13px;color:var(--lamp);letter-spacing:.1em;margin:1.6em 0 .6em;font-weight:normal}
#player .panel .pclose{position:sticky;top:0;float:right}
#player .start{position:absolute;inset:0;z-index:10;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;background:rgba(0,0,0,.55);cursor:pointer;text-align:center;padding:0 16px}
#player .start h1{font-size:clamp(30px,5vw,54px);letter-spacing:.15em}
#player .start .c{color:var(--muted)}
#player .start .res{font-size:13px;color:var(--muted)}
@media (max-width:600px){#player .sub{bottom:calc(env(safe-area-inset-bottom,0px) + 104px)} #player .ptop .t{display:none}}
@media (prefers-reduced-motion:reduce){#player .layer{transition:none}.book{transition:none}}