:root{
  --orange:#E8501E;
  --orange-deep:#B83A10;
  --ink:#1B1F23;
  --ink-2:#4A5158;
  --paper:#F7F5F0;
  --card:#FFFFFF;
  --line:#DDD8CE;
  --warn-bg:#FFF1EA;
  --note-bg:#EEF3F7;
  --mark:#FFE082;
  --fs:17px;
  --tap:56px;
  --sat:env(safe-area-inset-top,0px);
  --sab:env(safe-area-inset-bottom,0px);
}
[data-theme="dark"]{
  --ink:#ECEAE4;
  --ink-2:#A8AFB6;
  --paper:#12161A;
  --card:#1C2127;
  --line:#2E353D;
  --warn-bg:#3A2117;
  --note-bg:#1F2A34;
  --mark:#7A5A00;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --ink:#ECEAE4; --ink-2:#A8AFB6; --paper:#12161A; --card:#1C2127; --line:#2E353D;
    --warn-bg:#3A2117; --note-bg:#1F2A34; --mark:#7A5A00;
  }
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font:var(--fs)/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  overscroll-behavior-y:none;
}
#app{min-height:100vh;padding-bottom:calc(var(--sab) + 24px)}
a{color:var(--orange-deep)}
a[data-go],[data-go],[data-act]{cursor:pointer}
a[data-go]{text-decoration:underline}
[data-theme="dark"] a{color:#FF8A5B}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer;-webkit-tap-highlight-color:transparent}
img{max-width:100%;height:auto;display:block}
.hidden{display:none !important}

/* ---------- top bar ---------- */
.bar{
  position:sticky;top:0;z-index:5;
  background:var(--orange);color:#fff;
  padding:calc(var(--sat) + 8px) 8px 8px;
  display:flex;align-items:center;gap:4px;min-height:calc(var(--tap) + var(--sat));
  box-shadow:0 2px 0 rgba(0,0,0,.12);
}
.bar .ttl{flex:1;font-weight:700;font-size:1.05em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;padding:0 4px}
.bar .sub{display:block;font-weight:400;font-size:.78em;opacity:.9;margin-top:-2px}
.ibtn{width:48px;height:44px;flex:none;display:flex;align-items:center;justify-content:center;border-radius:10px;font-size:1.3em}
.ibtn:active{background:rgba(0,0,0,.15)}
.ibtn svg{width:26px;height:26px;fill:none;stroke:currentColor;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}

/* ---------- home ---------- */
.home-hero{
  position:relative;
  background:var(--orange);color:#fff;text-align:center;
  padding:calc(var(--sat) + 22px) 20px 26px;
}
.hero-btn{position:absolute;top:calc(var(--sat) + 8px);right:8px}
.home-hero img{width:150px;height:150px;border-radius:50%;margin:0 auto 12px;box-shadow:0 8px 24px rgba(0,0,0,.25)}
.home-hero h1{margin:0;font-size:1.9em;line-height:1.1;letter-spacing:-.01em}
.home-hero p{margin:6px 0 0;opacity:.92}
.searchbox{
  position:relative;z-index:1;
  display:flex;align-items:center;gap:10px;
  width:calc(100% - 32px);max-width:688px;margin:-24px auto 12px;padding:0 14px;height:52px;
  background:var(--card);border-radius:14px;border:1px solid var(--line);
  box-shadow:0 6px 18px rgba(0,0,0,.12);color:var(--ink-2);
}
.searchbox svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:2.4;stroke-linecap:round}
.list{list-style:none;margin:0;padding:8px 12px}
.list li{margin:0 0 8px}
.row{
  display:flex;align-items:center;gap:12px;width:100%;text-align:left;
  background:var(--card);border:1px solid var(--line);border-radius:14px;
  padding:14px 14px;min-height:var(--tap);
}
.row:active{background:var(--paper)}
.row .n{
  flex:none;width:40px;height:40px;border-radius:10px;background:var(--orange);color:#fff;
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1.05em;
}
.row .n svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.row .t{flex:1;min-width:0}
.row .t b{display:block;font-size:1.05em;line-height:1.25}
.row .t span{display:block;color:var(--ink-2);font-size:.86em;line-height:1.3;margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.row .chev{flex:none;color:var(--ink-2);font-size:1.4em;line-height:1}
.row.small{padding:12px 14px}
.row.small .t b{font-weight:600;font-size:1em}
.home-foot{color:var(--ink-2);font-size:.85em;text-align:center;padding:16px 24px 8px}
.home-foot button{color:var(--orange-deep);text-decoration:underline;margin-top:4px}
[data-theme="dark"] .home-foot button{color:#FF8A5B}

/* ---------- topic content ---------- */
.topic{padding:8px 18px calc(var(--sab) + 88px);max-width:720px;margin:0 auto}
.topic .crumb{color:var(--orange-deep);font-weight:600;font-size:.9em;margin:10px 0 2px;display:inline-flex;align-items:center;gap:2px;padding:4px 8px 4px 2px;margin-left:-2px;border-radius:8px}
.topic .crumb svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2.6;stroke-linecap:round;stroke-linejoin:round}
.topic .crumb:active{background:var(--warn-bg)}
[data-theme="dark"] .topic .crumb{color:#FF8A5B}
.topic h1{margin:0 0 14px;font-size:1.6em;line-height:1.15;letter-spacing:-.01em}
.topic h3{margin:22px 0 8px;font-size:1.08em;padding-left:10px;border-left:4px solid var(--orange);line-height:1.25}
.topic h3:first-child{margin-top:8px}
.topic p{margin:0 0 12px}
.topic ul,.topic ol{margin:0 0 14px;padding-left:24px}
.topic li{margin:0 0 6px}
.topic li ul,.topic li ol{margin:6px 0 4px}
.topic ul.check{list-style:none;padding-left:0}
.topic ul.check>li{padding-left:32px;position:relative}
.topic ul.check>li::before{content:"";position:absolute;left:2px;top:.25em;width:16px;height:16px;border:2px solid var(--orange);border-radius:4px}
.topic ol.check{padding-left:28px}
.topic ul.rules{list-style:none;padding:0;margin:14px 0}
.topic ul.rules li{background:var(--warn-bg);border-left:4px solid var(--orange);padding:8px 12px;margin:0 0 6px;border-radius:0 8px 8px 0}
.topic .warn{background:var(--warn-bg);border-left:4px solid var(--orange);padding:10px 14px;border-radius:0 10px 10px 0;font-weight:600}
.topic .note{background:var(--note-bg);padding:10px 14px;border-radius:10px;font-size:.95em}
.topic .muted{color:var(--ink-2);font-size:.92em}
.topic mark{background:var(--mark);color:inherit;padding:0 3px;border-radius:3px}
.topic code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.92em;background:var(--note-bg);padding:1px 5px;border-radius:4px}
.topic b{font-weight:700}

.topic figure{margin:12px 0 16px}
.topic figure img{border-radius:10px;background:#fff;margin:0 auto;max-height:70vh;width:auto;max-width:100%}
.topic figure.zoom img{cursor:zoom-in}
.topic figcaption{text-align:center;color:var(--ink-2);font-size:.88em;margin-top:6px}
.topic figure.qr img{width:140px}
.topic .row2,.topic .row3{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.topic .row3{grid-template-columns:1fr 1fr 1fr}
.topic .row2 figure,.topic .row3 figure{margin:0}
.topic .grid4,.topic .grid2{display:grid;grid-template-columns:repeat(4,1fr);gap:6px 10px;margin:0 0 14px;font-weight:600}
.topic .grid2{grid-template-columns:1fr 1fr}

.topic table{width:100%;border-collapse:collapse;margin:0 0 16px;font-size:.95em}
.topic th,.topic td{border:1px solid var(--line);padding:8px 10px;vertical-align:top;text-align:left}
.topic th{background:var(--note-bg);font-weight:700}
.topic td ul{margin:0;padding-left:18px}
.topic td ul li{margin:0 0 3px}
.topic table.flags td:first-child{font-weight:700;width:34%}
.f-red{background:#E53935;color:#fff}
.f-yellow{background:#FDD835;color:#111}
.f-green{background:#43A047;color:#fff}
.f-blue{background:#1E88E5;color:#fff}
.f-orange{background:#FB8C00;color:#fff}
.f-pink{background:#F48FB1;color:#111}
.topic table.radems th{width:24%;font-size:.9em}
.topic table.radems td.r0,.topic table.radems td.r1,.topic table.radems td.r2{white-space:nowrap;font-weight:700;width:1%}
.r0{background:#43A047;color:#fff}
.r1{background:#FDD835;color:#111}
.r2{background:#E53935;color:#fff}
.topic table.score td:last-child,.topic table.score th:last-child{width:1%;white-space:nowrap;text-align:center;font-weight:700}
.topic table.scale td:last-child{white-space:nowrap;text-align:center}

.topic dl{margin:0 0 14px}
.topic dt{font-weight:700;margin-top:8px}
.topic dd{margin:0 0 2px}
.topic dl.acro{display:grid;grid-template-columns:auto 1fr;gap:4px 12px}
.topic dl.acro dt{margin:0;white-space:nowrap}
.topic dl.acro dd{margin:0}

.pager{
  position:fixed;left:0;right:0;bottom:0;z-index:5;
  display:grid;grid-template-columns:1fr auto 1fr;gap:8px;align-items:stretch;
  padding:8px 12px calc(var(--sab) + 8px);
  background:var(--card);border-top:1px solid var(--line);
  box-shadow:0 -2px 10px rgba(0,0,0,.08);font-size:.85em;
}
.pager button{border:1px solid var(--line);background:var(--paper);border-radius:10px;padding:6px 10px;text-align:left;min-height:46px;min-width:0}
.pager button.next{text-align:right}
.pager button small{display:block;color:var(--ink-2);font-size:.8em;line-height:1.2}
.pager button span{font-weight:600;display:block;line-height:1.2;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pager button:disabled{visibility:hidden}
.pager button.index{display:flex;align-items:center;justify-content:center;width:52px;padding:0;color:var(--orange-deep)}
.pager button.index svg{width:24px;height:24px;flex:none;fill:none;stroke:currentColor;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
[data-theme="dark"] .pager button.index{color:#FF8A5B}
@media (min-width:720px){
  .pager{left:50%;right:auto;width:720px;transform:translateX(-50%);border-left:1px solid var(--line);border-right:1px solid var(--line);border-radius:14px 14px 0 0}
}

/* ---------- search ---------- */
.sinput{
  display:flex;align-items:center;gap:8px;flex:1;height:44px;padding:0 12px;
  background:rgba(255,255,255,.95);border-radius:10px;color:#111;
}
.sinput svg{fill:none;stroke:currentColor;stroke-width:2.4;stroke-linecap:round}
.sinput input{flex:1;border:0;background:none;font:inherit;font-size:1.05em;outline:none;min-width:0;color:#111}
.sinput input::placeholder{color:#777}
.sinput button{color:#777;font-size:1.1em;padding:6px}
.sres{padding:8px 12px}
.sres .hint{color:var(--ink-2);text-align:center;padding:32px 16px}
.sres .row{margin-bottom:8px;align-items:flex-start}
.sres .row .t b{font-weight:700}
.sres .row .t small{display:block;color:var(--orange-deep);font-size:.8em;font-weight:600;margin-bottom:2px}
[data-theme="dark"] .sres .row .t small{color:#FF8A5B}
.sres .row .t span{white-space:normal;overflow:visible;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical}
.sres mark{background:var(--mark);color:inherit;padding:0 2px;border-radius:2px}

/* ---------- settings ---------- */
.settings{padding:16px;max-width:560px;margin:0 auto}
.settings h2{font-size:1.05em;margin:18px 0 8px;color:var(--ink-2)}
.seg{display:flex;background:var(--card);border:1px solid var(--line);border-radius:12px;overflow:hidden}
.seg button{flex:1;min-height:var(--tap);font-weight:600}
.seg button+button{border-left:1px solid var(--line)}
.seg button.on{background:var(--orange);color:#fff}
.settings p{color:var(--ink-2);font-size:.92em}
.settings .about{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px}
.settings .about b{display:block;margin-bottom:4px}
.install{background:var(--note-bg);border-radius:12px;padding:14px;margin-top:12px}
.install>b{display:block;margin-bottom:6px}
.install ol{margin:0;padding-left:22px}
.install .seg{margin:0 0 12px}
.install ol.steps li{margin:0 0 10px;line-height:1.4}
.install .muted{color:var(--ink-2);font-size:.9em}
.install .ic{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;vertical-align:middle;margin:-4px 2px 0;border-radius:8px;background:var(--card);border:1px solid var(--line);color:var(--ink)}
.install .ic svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.install .ic.ios{color:#0A84FF}
.install .chip{display:inline-block;vertical-align:middle;margin:-3px 2px 0;padding:2px 12px;border-radius:999px;font-weight:600;font-size:.92em;line-height:1.5}
.install .chip.ios{color:#0A84FF;background:var(--card);border:1px solid var(--line)}
.install .chip.android{color:#fff;background:#1A73E8}
.settings h2#install{scroll-margin-top:calc(var(--tap) + var(--sat) + 12px)}

/* ---------- image viewer ---------- */
#viewer{position:fixed;inset:0;z-index:50;background:#000}
#viewer .vscroll{position:absolute;inset:0;overflow:hidden;display:flex;align-items:center;justify-content:center;touch-action:none;cursor:zoom-in;user-select:none;-webkit-user-select:none}
#viewer img{width:auto;height:auto;max-height:100%;max-width:100%;object-fit:contain;transform-origin:center;transition:none;-webkit-user-drag:none;will-change:transform}
#viewer .vclose{position:absolute;top:calc(var(--sat) + 10px);right:10px;z-index:2;width:44px;height:44px;border-radius:50%;background:rgba(255,255,255,.18);color:#fff;font-size:1.3em}
#viewer .vhint{position:absolute;bottom:calc(var(--sab) + 14px);left:0;right:0;text-align:center;color:#bbb;font-size:.85em;pointer-events:none}

#toast{position:fixed;left:50%;bottom:calc(var(--sab) + 20px);transform:translateX(-50%);background:var(--ink);color:var(--paper);padding:10px 16px;border-radius:999px;font-size:.9em;z-index:60;box-shadow:0 6px 18px rgba(0,0,0,.3);white-space:nowrap}

@media (prefers-reduced-motion:no-preference){
  .row,.pager button{transition:background .12s}
}
:focus-visible{outline:3px solid #FFB74D;outline-offset:2px}
@media (min-width:720px){
  .list{max-width:720px;margin:0 auto}
}