/* qa-wall 共用樣式——沿用 prototype/index.html 的視覺 token 與元件 */
:root{
  --ground:#F7F8FC; --surface:#FFFFFF; --surface-2:#F1F3FA; --surface-3:#E8ECF7;
  --line:#DFE3F0; --line-soft:#EAEDF7;
  --ink:#151A2E; --ink-2:#4B5270; --ink-3:#828AA6;
  --accent:#3854D8; --accent-ink:#2B41AB; --accent-soft:#E8ECFC;
  --ok:#0E7A56; --ok-soft:#DFF3EA;
  --warn:#9A5B08; --warn-soft:#FBEEDA;
  --mute:#5E6480; --mute-soft:#E9EBF3;
  --stage:#10142A; --stage-2:#171C38; --stage-ink:#F2F4FF; --stage-ink-2:#98A0C8; --stage-line:#2A3157;
  --s-ok:#5FD3A6; --s-warn:#E5AC5B; --s-mute:#8A91B4; --s-bar:#8FA3FF; --s-track:#232A4D;
  --shadow:0 1px 2px rgba(21,26,46,.05), 0 12px 32px -18px rgba(21,26,46,.35);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --ground:#0C0F1C; --surface:#141931; --surface-2:#1B2140; --surface-3:#232A4D;
    --line:#2A3157; --line-soft:#222847;
    --ink:#EDEFFA; --ink-2:#A9B0D0; --ink-3:#7A82A6;
    --accent:#8FA3FF; --accent-ink:#B3C0FF; --accent-soft:#1E2647;
    --ok:#5FD3A6; --ok-soft:#12312A;
    --warn:#E5AC5B; --warn-soft:#33260F;
    --mute:#9AA1C0; --mute-soft:#1E2340;
    --shadow:0 1px 2px rgba(0,0,0,.4), 0 14px 34px -18px rgba(0,0,0,.7);
  }
}
*{box-sizing:border-box}
body{margin:0;background:var(--ground);color:var(--ink);
  font-family:"Noto Sans TC","PingFang TC",system-ui,sans-serif;font-size:15px;line-height:1.7;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{text-wrap:balance;margin:0}
.mono{font-family:"IBM Plex Mono",ui-monospace,monospace;font-variant-numeric:tabular-nums}
.wrap{max-width:1080px;margin:0 auto;padding:30px 20px 64px}
.wrap.narrow{max-width:460px}
.masthead{display:flex;flex-wrap:wrap;gap:12px;align-items:baseline;justify-content:space-between;margin-bottom:22px}
.masthead h1{font-family:"Manrope","Noto Sans TC",sans-serif;font-weight:800;font-size:clamp(22px,3vw,28px);letter-spacing:-.02em}
.beta{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;letter-spacing:.06em;
  padding:3px 9px;border-radius:999px;background:var(--warn-soft);color:var(--warn);text-transform:uppercase}
.card{border:1px solid var(--line);border-radius:14px;background:var(--surface);box-shadow:var(--shadow);padding:22px;margin-bottom:20px}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:15px}
.field label{font-size:12.5px;font-weight:700;letter-spacing:.03em;color:var(--ink-2)}
.field input[type=text],.field input[type=email]{font:inherit;font-size:14px;padding:9px 11px;border:1px solid var(--line);
  border-radius:9px;background:var(--surface);color:var(--ink)}
.field input:focus-visible{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}
.btn{font:inherit;font-weight:700;font-size:14px;padding:10px 18px;border-radius:9px;border:1px solid transparent;
  background:var(--accent);color:#fff;cursor:pointer;text-decoration:none;display:inline-block}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.btn.ghost{background:var(--surface);border-color:var(--line);color:var(--ink)}
.btn.wide{width:100%}
.btn.sm{font-size:12.5px;padding:5px 12px}
.btn[disabled]{opacity:.5;cursor:default}
.chip{display:inline-flex;align-items:center;gap:5px;font-size:11.5px;font-weight:700;padding:2px 9px;border-radius:999px;line-height:1.7;white-space:nowrap}
.chip.ok{background:var(--ok-soft);color:var(--ok)}
.chip.warn{background:var(--warn-soft);color:var(--warn)}
.chip.mute{background:var(--mute-soft);color:var(--mute)}
.chip.live{background:var(--accent-soft);color:var(--accent-ink)}
.kv{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:7px 0;border-bottom:1px dashed var(--line-soft);font-size:13px}
.kv:last-of-type{border-bottom:0}
.kv span:first-child{color:var(--ink-3)}
.kv .code{font-family:"IBM Plex Mono",monospace;font-size:22px;letter-spacing:.06em;color:var(--accent-ink)}
.err{color:var(--warn);font-size:13px;margin-top:8px;font-weight:700}
.tag{display:inline-block;font-size:10.5px;font-weight:700;padding:1px 6px;border-radius:5px;background:var(--surface-3);color:var(--ink-2);vertical-align:1px}

/* 報到 phone */
.phone{max-width:400px;margin:0 auto;border:1px solid var(--line);border-radius:22px;background:var(--surface);box-shadow:var(--shadow);overflow:hidden}
.enter{padding:22px 20px 24px}
.enter h3{font-size:17px;font-weight:700}
.enter .lead{font-size:13px;color:var(--ink-2);margin:6px 0 18px;line-height:1.65}
.privacy{margin-top:14px;border:1px solid var(--line);border-radius:10px;background:var(--surface-2);padding:12px 13px;font-size:12px;color:var(--ink-2);line-height:1.6}
.privacy b{color:var(--ink);display:block;margin-bottom:4px;font-size:12.5px}
.privacy .em{color:var(--warn);font-weight:700}

/* 問答室 */
.room-top{padding:12px 15px;border-bottom:1px solid var(--line-soft);display:flex;justify-content:space-between;gap:10px;align-items:flex-start}
.room-top .title{font-weight:700;font-size:15px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.room-top .sub{font-size:11.5px;color:var(--ink-3);margin-top:4px;line-height:1.55}
.online{display:inline-flex;align-items:center;gap:5px;font-size:11.5px;color:var(--ok);font-weight:700;white-space:nowrap}
.online i{width:7px;height:7px;border-radius:50%;background:var(--ok);display:block}
.room{padding:14px;height:min(62vh,560px);overflow:auto;display:flex;flex-direction:column;gap:16px;background:var(--surface-2)}
.msg{display:grid;grid-template-columns:auto minmax(0,1fr);gap:9px}
.msg .av{width:26px;height:26px;border-radius:8px;display:grid;place-items:center;font-size:10px;font-weight:700;
  background:var(--surface-3);color:var(--ink-2);font-family:"IBM Plex Mono",monospace}
.msg .name{font-size:11.5px;color:var(--ink-3);margin-bottom:3px}
.bubble{background:var(--surface);border:1px solid var(--line);border-radius:4px 12px 12px 12px;padding:9px 12px;font-size:13.5px}
.msg.me{grid-template-columns:minmax(0,1fr) auto}
.msg.me .av{background:var(--accent);color:#fff;order:2}
.msg.me .body{text-align:right}
.msg.me .bubble{background:var(--accent-soft);border-color:var(--accent-soft);border-radius:12px 4px 12px 12px;text-align:left;display:inline-block}
.reply{margin:8px 0 0 12px;border-left:2px solid var(--accent);padding-left:11px;text-align:left}
.reply .who{display:flex;align-items:center;gap:6px;font-size:11.5px;font-weight:700;color:var(--accent-ink);margin-bottom:4px}
.reply .who .av2{width:17px;height:17px;border-radius:5px;background:var(--accent);color:#fff;display:grid;place-items:center;font-size:9px;font-family:"Manrope",sans-serif;font-weight:800}
.reply .txt{font-size:13px;color:var(--ink-2);white-space:pre-wrap}
.reply .st{margin-top:7px}
.composer{border-top:1px solid var(--line);padding:13px 14px;background:var(--surface)}
.composer .row{display:flex;gap:8px}
.composer input{flex:1;font:inherit;font-size:14px;padding:10px 12px;border:1px solid var(--line);border-radius:9px;background:var(--surface-2);color:var(--ink);min-width:0}
.composer input:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
.composer .hint{font-size:11.5px;color:var(--ink-3);margin:7px 0 0}
.seg{display:inline-flex;border:1px solid var(--line);border-radius:9px;overflow:hidden;margin-bottom:10px}
.seg button{font:inherit;font-size:12.5px;font-weight:700;padding:6px 13px;border:0;background:var(--surface-2);color:var(--ink-3);cursor:pointer}
.seg button.on{background:var(--accent);color:#fff}
.pollcard{border:1px solid var(--accent);background:var(--accent-soft);border-radius:12px;padding:13px 14px}
.pollcard .eyebrow{font-size:11px;font-weight:700;letter-spacing:.06em;color:var(--accent-ink);text-transform:uppercase}
.pollcard h4{margin:5px 0 11px;font-size:14.5px;font-weight:700}
.scale{display:flex;gap:6px}
.scale button{flex:1;font:inherit;font-family:"IBM Plex Mono",monospace;font-size:16px;padding:9px 0;
  border-radius:9px;border:1px solid var(--accent);background:var(--surface);color:var(--accent-ink);cursor:pointer}
.scale button:hover{background:var(--accent);color:#fff}
.scale-ends{display:flex;justify-content:space-between;font-size:11px;color:var(--ink-3);margin-top:6px}
.voted{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ok);font-weight:700}

/* 投影模式 */
.stage{background:var(--stage);color:var(--stage-ink);border-radius:14px;padding:26px 30px;border:1px solid var(--stage-line);
  min-height:82vh;display:flex;flex-direction:column;gap:16px;overflow:hidden}
.stage-head{display:flex;justify-content:space-between;align-items:baseline;gap:14px;flex-wrap:wrap}
.stage-head h3{font-family:"Manrope","Noto Sans TC",sans-serif;font-weight:800;font-size:clamp(18px,2.4vw,26px)}
.livepill{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;font-weight:700;letter-spacing:.05em;
  padding:3px 10px;border-radius:999px;background:var(--stage-2);color:var(--s-ok);border:1px solid var(--stage-line)}
.livepill i{width:7px;height:7px;border-radius:50%;background:var(--s-ok);display:block}
.stage-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:24px;min-height:0;flex:1}
@media (max-width:820px){.stage-grid{grid-template-columns:1fr}}
.blk h4{font-size:13px;font-weight:700;letter-spacing:.07em;color:var(--stage-ink-2);text-transform:uppercase;margin-bottom:9px}
.hero{display:flex;align-items:baseline;gap:12px;margin-bottom:12px}
.hero b{font-family:"IBM Plex Mono",monospace;font-size:clamp(30px,4.4vw,46px);font-weight:500;line-height:1;color:var(--stage-ink);font-variant-numeric:tabular-nums}
.hero span{font-size:12.5px;color:var(--stage-ink-2)}
.bars{display:flex;flex-direction:column;gap:7px}
.brow{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:11px;align-items:center}
.brow .lb{font-family:"IBM Plex Mono",monospace;font-size:12.5px;color:var(--stage-ink-2);width:1.2em;text-align:right}
.brow .tr{height:15px;background:var(--s-track);border-radius:4px;overflow:hidden}
.brow .fl{height:100%;background:var(--s-bar);border-radius:0 4px 4px 0;transition:width .5s cubic-bezier(.22,1,.36,1)}
.brow .vv{font-family:"IBM Plex Mono",monospace;font-size:12.5px;color:var(--stage-ink);min-width:2.1em;font-variant-numeric:tabular-nums}
.stack{display:flex;gap:2px;height:17px;margin-bottom:9px}
.stack div{border-radius:2px;transition:width .4s ease}
.legend{display:flex;flex-direction:column;gap:5px}
.lg{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:9px;align-items:center;font-size:12.5px;color:var(--stage-ink-2)}
.lg i{width:9px;height:9px;border-radius:2px;display:block}
.lg b{font-family:"IBM Plex Mono",monospace;color:var(--stage-ink);font-weight:500;font-variant-numeric:tabular-nums}
.flow{display:flex;flex-direction:column;gap:8px;margin-top:14px;min-height:0;overflow:auto;flex:1}
.flow .f{border-top:1px solid var(--stage-line);padding-top:8px;font-size:13px}
.flow .f .qq{color:var(--stage-ink)}
.flow .f .mm{font-size:11px;color:var(--stage-ink-2);margin-top:2px}
.stage-foot{font-size:11.5px;color:var(--stage-ink-2);border-top:1px solid var(--stage-line);padding-top:10px}

/* host 表格 */
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:12px}
table{border-collapse:collapse;width:100%;font-size:13px}
th,td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--line-soft);vertical-align:top}
th{background:var(--surface-2);font-size:11.5px;letter-spacing:.04em;color:var(--ink-2);font-weight:700;white-space:nowrap}
tbody tr:last-child td{border-bottom:0}
.qr{margin:14px auto 6px;display:block;border-radius:8px;background:#fff;padding:8px;width:166px;height:166px}
.split{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:24px}
@media (max-width:760px){.split{grid-template-columns:1fr}}
.exportbar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:14px}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}