/* 天下太平 · 紙筆風格 */
:root{
  --paper:#f7f1e0;
  --paper2:#efe6cd;
  --ink:#2b2622;
  --ink2:#6b6155;
  --red:#c0342a;
  --red-d:#8f2118;
  --blue:#2f5f8f;
  --green:#3d7a4f;
  --line:rgba(43,38,34,.22);
}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
[hidden]{display:none!important}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang TC","Noto Sans TC","Microsoft JhengHei",sans-serif;
  background:
    radial-gradient(700px 400px at 90% -10%, rgba(192,52,42,.10), transparent 55%),
    radial-gradient(700px 400px at -10% 110%, rgba(47,95,143,.10), transparent 55%),
    var(--paper);
  color:var(--ink);min-height:100vh;line-height:1.5;
}
/* ruled-paper texture */
body::before{content:"";position:fixed;inset:0;pointer-events:none;opacity:.5;z-index:0;
  background:repeating-linear-gradient(transparent 0 27px, rgba(47,95,143,.07) 27px 28px)}
.topbar{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;
  padding:12px 16px;background:rgba(247,241,224,.92);backdrop-filter:blur(8px);
  border-bottom:2px solid var(--ink);box-shadow:0 2px 0 rgba(43,38,34,.08)}
.brand{display:flex;align-items:center;gap:10px}
.seal{width:38px;height:38px;border-radius:8px;background:var(--red);color:#fff;display:grid;place-items:center;
  font-family:"Kaiti SC","STKaiti",serif;font-size:22px;box-shadow:inset 0 -2px 0 var(--red-d)}
.brand h1{font-family:"Kaiti SC","STKaiti","PingFang TC",serif;font-size:21px;letter-spacing:2px}
.brand small{display:block;font-size:10px;color:var(--ink2);letter-spacing:1.5px}
.pill{background:#fff;border:1.5px solid var(--ink);border-radius:999px;padding:6px 14px;font-size:13px;font-weight:700;cursor:pointer;color:var(--ink)}
.pill:active{transform:scale(.96)}
main{position:relative;z-index:1;max-width:560px;margin:0 auto;padding:20px 14px 60px}
.step{animation:fadeUp .4s ease both}
@keyframes fadeUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.step-title{text-align:center;font-family:"Kaiti SC","STKaiti",serif;font-size:23px;margin-bottom:14px;letter-spacing:1px}
.mode-opts{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:16px}
.mode-opt{background:#fff;border:2px solid var(--line);border-radius:14px;padding:16px 10px;cursor:pointer;
  display:flex;flex-direction:column;align-items:center;gap:6px;text-align:center;transition:.15s}
.mo-icon{font-size:26px}
.mode-opt b{font-size:15px}
.mode-opt small{font-size:11px;color:var(--ink2)}
.mode-opt.active{border-color:var(--red);background:#fff5f2;box-shadow:0 0 0 3px rgba(192,52,42,.15)}
.field-label{text-align:center;font-size:12px;letter-spacing:2px;color:var(--ink2);margin:14px 0 8px}
.rules-box{background:#fff;border:1.5px dashed var(--line);border-radius:12px;padding:12px 14px;font-size:12.5px;color:var(--ink2);margin-bottom:14px}
.opt-row{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:16px}
.toggle-row{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink2);cursor:pointer}
.toggle-row input{display:none}
.toggle-track{width:40px;height:23px;border-radius:999px;background:rgba(43,38,34,.18);position:relative;transition:.2s;flex:none}
.toggle-track::after{content:"";position:absolute;top:3px;left:3px;width:17px;height:17px;border-radius:50%;background:#fff;transition:.2s;box-shadow:0 1px 3px rgba(0,0,0,.3)}
.toggle-row input:checked + .toggle-track{background:var(--green)}
.toggle-row input:checked + .toggle-track::after{transform:translateX(17px)}
.primary{display:block;width:100%;background:var(--red);color:#fff;border:2px solid var(--ink);border-radius:14px;
  padding:14px;font-size:16px;font-weight:800;cursor:pointer;box-shadow:0 4px 0 var(--red-d), 0 8px 14px rgba(192,52,42,.25);letter-spacing:1px;transition:.1s}
.primary:active{transform:translateY(3px);box-shadow:0 1px 0 var(--red-d)}
.primary.ghost{background:#fff;color:var(--ink);box-shadow:0 4px 0 rgba(43,38,34,.35);margin-top:10px}
/* status */
.status-bar{display:flex;align-items:center;justify-content:center;gap:10px;background:#fff;border:2px solid var(--ink);
  border-radius:12px;padding:10px 14px;font-size:15px;font-weight:700;margin-bottom:8px;box-shadow:0 3px 0 rgba(43,38,34,.15);text-align:center}
.combo-tag{background:var(--red);color:#fff;border-radius:999px;padding:3px 10px;font-size:12px;animation:pulse .8s infinite alternate}
@keyframes pulse{from{transform:scale(1)}to{transform:scale(1.08)}}
.timer-bar{height:8px;background:rgba(43,38,34,.12);border-radius:99px;overflow:hidden;margin-bottom:10px}
.timer-bar>div{height:100%;background:var(--red);width:100%;border-radius:99px;transition:width .2s linear}
/* board */
.board{display:flex;flex-direction:column;gap:10px}
.side{background:#fff;border:2px solid var(--ink);border-radius:14px;padding:10px 12px;box-shadow:0 3px 0 rgba(43,38,34,.15)}
.side-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}
.side-name{font-weight:800;font-size:14px}
.side-badge{font-size:12px;color:var(--ink2);font-variant-numeric:tabular-nums}
.slot-row{display:flex;gap:6px;margin-bottom:6px}
.char-slot{flex:1;height:52px;background:var(--paper2);border:1.5px solid var(--line);border-radius:8px;display:grid;place-items:center;position:relative;overflow:hidden}
.char-slot.filled{background:#fff;border-color:var(--ink);animation:writeIn .3s cubic-bezier(.2,1.6,.4,1) both}
@keyframes writeIn{0%{transform:scale(1.25) rotate(-3deg);opacity:.4}60%{transform:scale(.96) rotate(1deg);opacity:1}100%{transform:none}}
.char-slot.hit,.fac.hit{animation:shake .35s ease;border-color:var(--red)}
.char-slot.hit{color:var(--red)}
.char-slot svg{width:100%;height:100%;display:block}
.fac-row{display:flex;gap:6px;height:34px}
.fac{flex:1;display:flex;align-items:center;justify-content:center;gap:4px;background:var(--paper2);border:1.5px dashed var(--line);border-radius:8px;font-size:11px;color:var(--ink2);transition:.2s}
.fac.on{background:#fff;border-style:solid;border-color:var(--ink);color:var(--ink);font-weight:700}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-4px)}75%{transform:translateX(4px)}}
/* RPS */
.rps-arena{margin:4px 0}
.pick-panel,.reveal-panel{background:#fff;border:2px solid var(--ink);border-radius:14px;padding:14px;box-shadow:0 3px 0 rgba(43,38,34,.15)}
.pick-hint{text-align:center;font-size:13px;color:var(--ink2);margin-bottom:10px;font-weight:600}
.gestures{display:flex;justify-content:center;gap:12px}
.gesture{flex:1;max-width:110px;background:var(--paper2);border:2px solid var(--ink);border-radius:12px;padding:10px 6px;cursor:pointer;transition:.12s}
.gesture:active{transform:scale(.94)}
.gesture .g-sym{display:block;font-size:30px;margin-bottom:4px}
.gesture b{font-size:14px}
.gesture.picked{border-color:var(--red);background:#fff5f2;box-shadow:0 0 0 3px rgba(192,52,42,.18)}
.gesture:disabled{opacity:.45;cursor:default}
.reveal-panel{text-align:center}
.reveal-row{display:flex;justify-content:center;align-items:center;gap:12px;font-size:18px;font-weight:800}
.rvs-sym{font-size:34px;transition:.3s}
.vs{font-size:12px;color:var(--ink2);margin:2px 0;letter-spacing:2px}
.round-result{font-weight:800;font-size:15px;margin-top:8px}
.round-result.win{color:var(--green)}.round-result.lose{color:var(--red)}.round-result.tie{color:var(--ink2)}
/* actions */
.action-panel{background:#fff;border:2px solid var(--ink);border-radius:14px;padding:12px;margin-top:10px;box-shadow:0 3px 0 rgba(43,38,34,.15)}
.actions{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}
.action-btn{border:2px solid var(--ink);border-radius:10px;padding:12px 8px;background:var(--paper2);cursor:pointer;font-weight:800;font-size:13.5px;transition:.12s}
.action-btn:active{transform:scale(.96)}
.action-btn.locked{opacity:.4}
.action-btn.fire{border-color:var(--red);background:#fff5f2;color:var(--red)}
/* end */
.end-box{background:#fff;border:2px solid var(--ink);border-radius:18px;padding:28px 18px;text-align:center;box-shadow:0 6px 0 rgba(43,38,34,.2)}
.end-title{font-size:34px;margin-bottom:8px;font-family:"Kaiti SC","STKaiti",serif}
.end-sub{color:var(--ink2);margin-bottom:18px;font-size:14px}
.site-footer{position:relative;z-index:1;text-align:center;padding:0 16px 26px;font-size:11px;color:var(--ink2)}
@media (max-width:400px){
  .char-slot{height:44px}
  .gesture .g-sym{font-size:26px}
}