:root{--bg:#faf8f4;--fg:#222;--muted:#777;--card:#fff;--line:#e4dfd6;--accent:#8a5a2b;--hl:#ffe9a8}
body[data-theme=sepia]{--bg:#f1e6cf;--fg:#3b2f1e;--muted:#7d6c52;--card:#f8efdc;--line:#dccdae;--accent:#7a4a1c;--hl:#f3d98a}
body[data-theme=dark]{--bg:#16161a;--fg:#d9d9de;--muted:#8a8a94;--card:#202026;--line:#32323a;--accent:#d9a066;--hl:#4a3f1f}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{height:100%;margin:0;overscroll-behavior:none}
body{background:var(--bg);color:var(--fg);font:16px/1.4 -apple-system,system-ui,"Segoe UI",Roboto,sans-serif}
section{position:fixed;inset:0;display:flex;flex-direction:column;background:var(--bg)}
section[hidden]{display:none}
.bar{display:flex;align-items:center;gap:8px;padding:calc(env(safe-area-inset-top) + 8px) 12px 8px;border-bottom:1px solid var(--line);background:var(--bg)}
.bar h1{font-size:20px;margin:0;flex:1}
.ttl{flex:1;text-align:center;font-size:14px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
button,.btn{font:inherit;color:var(--fg);background:var(--card);border:1px solid var(--line);border-radius:10px;padding:8px 12px;min-height:40px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center}
.btn.primary,button.primary{background:var(--accent);color:#fff;border-color:var(--accent)}
#u-shelf{flex:1;overflow:auto;padding:14px;display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:14px;align-content:start}
#u-empty{position:absolute;top:90px;left:0;right:0;text-align:center;color:var(--muted);padding:0 30px}
.card{position:relative;background:var(--card);border:1px solid var(--line);border-radius:12px;overflow:hidden;cursor:pointer;display:flex;flex-direction:column}
.cover{aspect-ratio:2/3;background:#999 center/cover no-repeat;display:flex;align-items:center;justify-content:center;padding:10px;text-align:center;color:#fff;font-weight:600;font-size:14px;overflow:hidden}
.meta{padding:8px 10px}
.meta b{display:block;font-size:13px;line-height:1.25;max-height:2.5em;overflow:hidden}
.meta small{color:var(--muted);font-size:12px}
.prog{height:3px;background:var(--line)}
.prog i{display:block;height:100%;background:var(--accent)}
.del{position:absolute;top:6px;right:6px;padding:0;min-height:0;width:28px;height:28px;border-radius:14px;background:rgba(0,0,0,.55);color:#fff;border:none}
#u-scroll{flex:1;overflow:auto;-webkit-overflow-scrolling:touch}
#u-content{position:relative;max-width:42rem;margin:0 auto;padding:18px 20px 12px;font-family:Georgia,"Iowan Old Style",serif;font-size:var(--fs,19px);line-height:1.6;overflow-wrap:break-word;hyphens:auto}
#u-content img,#u-content svg{max-width:100%;height:auto}
#u-content p{margin:0 0 .8em}
#u-content h1,#u-content h2,#u-content h3,#u-content h4{line-height:1.25}
#u-content a{color:var(--accent)}
#u-content .tts-now{background:var(--hl);border-radius:4px;box-decoration-break:clone;-webkit-box-decoration-break:clone}
#u-endnav{text-align:center;padding:10px 0 40px}
.ctl{display:flex;align-items:center;justify-content:center;gap:8px;padding:8px 10px calc(env(safe-area-inset-bottom) + 8px);border-top:1px solid var(--line);background:var(--bg)}
.ctl button{min-width:44px}
#u-play{min-width:68px;background:var(--accent);color:#fff;border-color:var(--accent);font-size:18px}
#u-pos{font-size:12px;color:var(--muted);min-width:48px;text-align:right}
.back{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:5}
.sheet{position:fixed;left:0;right:0;bottom:0;max-height:75vh;overflow:auto;background:var(--bg);border-top:1px solid var(--line);border-radius:16px 16px 0 0;padding:14px 16px calc(env(safe-area-inset-bottom) + 16px);z-index:6}
.sheet[hidden],.back[hidden]{display:none}
.row{display:flex;align-items:center;gap:10px;margin:12px 0}
.row>label{flex:0 0 84px;color:var(--muted);font-size:14px}
.row select,.row input[type=range]{flex:1;min-width:0}
.row .val{flex:0 0 44px;text-align:right;font-size:14px;color:var(--muted)}
select{font:inherit;padding:8px;border-radius:8px;border:1px solid var(--line);background:var(--card);color:var(--fg)}
.toc a{display:block;padding:10px 4px;border-bottom:1px solid var(--line);color:var(--fg);text-decoration:none;font-size:15px}
.toc a.on{color:var(--accent);font-weight:600}
#u-toast{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(env(safe-area-inset-bottom) + 84px);background:rgba(20,20,20,.92);color:#fff;padding:10px 14px;border-radius:10px;font-size:14px;z-index:9;max-width:90%;opacity:0;pointer-events:none;transition:opacity .2s;text-align:center}
#u-toast.on{opacity:1}
.tools{display:flex;gap:8px;padding:8px 12px;border-bottom:1px solid var(--line)}
.tools[hidden]{display:none}
.tools input{flex:1;min-width:0;font:inherit;padding:8px 10px;border-radius:8px;border:1px solid var(--line);background:var(--card);color:var(--fg)}
#u-storage{padding:6px 14px calc(env(safe-area-inset-bottom) + 8px);font-size:12px;color:var(--muted);text-align:center}
#u-drop{position:absolute;inset:0;z-index:8;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.55);color:#fff;font-size:20px;font-weight:600;pointer-events:none}
#u-drop[hidden]{display:none}
.done{position:absolute;top:6px;left:6px;background:var(--accent);color:#fff;border-radius:8px;font-size:11px;padding:2px 6px}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
#u-acct{display:flex;align-items:center;gap:8px;padding:6px 12px;border-bottom:1px solid var(--line);font-size:13px;color:var(--muted)}
#u-acct span{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
#u-acct .btn,#u-acct button{min-height:32px;padding:4px 10px;font-size:13px}
#u-acct [hidden]{display:none}
.kind{position:absolute;top:6px;left:6px;background:rgba(0,0,0,.55);color:#fff;border-radius:8px;font-size:12px;padding:2px 6px}
.done{top:32px}
#u-player .a-body{flex:1;overflow:auto;padding:16px 20px calc(env(safe-area-inset-bottom) + 20px);max-width:32rem;width:100%;margin:0 auto;text-align:center}
.a-cover{width:min(60vw,240px);aspect-ratio:1;margin:8px auto 14px;border-radius:14px;background:var(--line) center/cover no-repeat;display:flex;align-items:center;justify-content:center;font-size:64px;border:1px solid var(--line)}
.a-body h2{margin:0 0 4px;font-size:20px;line-height:1.25}
.muted{color:var(--muted);font-size:13px;margin:2px 0}
#a-seek{width:100%;margin:14px 0 2px}
.a-times{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}
.a-ctl{display:flex;justify-content:center;gap:8px;margin:14px 0}
.a-ctl button{min-width:48px;min-height:48px;font-size:15px}
#a-play{min-width:76px;background:var(--accent);color:#fff;border-color:var(--accent);font-size:22px}
.a-opts{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin:6px 0 12px}
#a-off{font-size:13px}
#a-tracks a{display:block;padding:10px 4px;border-bottom:1px solid var(--line);color:var(--fg);text-decoration:none;font-size:15px}
#a-tracks a.on{color:var(--accent);font-weight:600}