/* Golden Bell product UI. Tokens are taken from mockups/goldenbell-ux-v1.1.html (sea-teal board-game look). */
*{box-sizing:border-box}
:root{--sea1:#187b91;--sea2:#075063;--paper:#fff3d7;--brown:#3a281d;--yellow:#ffc94f;--teal:#28aaa8;--red:#ef6657;--green:#61a957;--ink:#38291f;--muted:#8a735f}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:system-ui,-apple-system,"Noto Sans KR",sans-serif;color:var(--ink);background:linear-gradient(180deg,var(--sea1),var(--sea2));background-attachment:fixed;min-height:100vh}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3{margin:.3em 0}
.hidden{display:none!important}
.page{padding:18px;max-width:1300px;margin:auto}
.brand{text-align:center;color:#fff;margin:4px 0 14px}
.brand small{display:block;font-weight:800;opacity:.9}
.logo{font-size:42px;font-weight:1000;letter-spacing:-3px;color:#ffd05b;text-shadow:0 4px 0 #6a4025,0 7px 12px #0006}
.paper{background:var(--paper);border:4px solid var(--brown);border-radius:20px;box-shadow:0 8px 0 #38271db5,0 16px 28px #002c3855;padding:18px}
.dots{background-color:var(--paper);background-image:radial-gradient(#cda96b30 1.2px,transparent 1.2px);background-size:12px 12px}
.muted{color:var(--muted)}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.grow{flex:1;min-width:0}
.spread{display:flex;justify-content:space-between;align-items:center;gap:8px;flex-wrap:wrap}
.stack>*+*{margin-top:12px}
.badge,.btn,.conn,.tab{color:var(--ink)}
.badge{display:inline-block;background:#fff1c8;border:2px solid var(--brown);border-radius:999px;padding:5px 10px;font-weight:900}
.badge.warn{background:#ffe27d}.badge.bad{background:#f5aaa2}.badge.good{background:#d9f5ef}
.btn{border:3px solid var(--brown);border-radius:12px;padding:11px 15px;min-height:44px;font-weight:900;box-shadow:0 4px 0 var(--brown);background:#fff3d7;cursor:pointer;touch-action:manipulation}
.btn:active:not(:disabled){transform:translateY(3px);box-shadow:0 1px 0 var(--brown)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn.primary{background:linear-gradient(#ffd66b,#ffbd3d)}
.btn.teal{background:#35b7b2}
.btn.red{background:#f47b6b}
.btn.green{background:#86c878}
.btn.small{padding:6px 10px;min-height:36px;font-size:14px}
@media(pointer:coarse),(max-width:1400px){.btn.small{min-height:44px;padding:8px 14px}}
.btn.big{font-size:22px;padding:14px 18px;min-height:56px}
.btn.block{width:100%}
.btn.disabled-feature{background:#e5e0d9;border-style:dashed;box-shadow:none;color:#7a6c5f}
input[type=text],input[type=password],input[type=number],input[type=search],textarea,select{border:3px solid var(--brown);border-radius:11px;padding:10px;background:#fffaf0;min-height:44px;width:100%}
textarea{min-height:90px;resize:vertical}
label.field{display:block;font-weight:900;margin:10px 0 4px}
.hint{font-size:13px;color:var(--muted);margin:4px 0;overflow-wrap:anywhere}
.dev-banner{background:#ffe27d;border:3px solid var(--brown);border-radius:12px;padding:8px 12px;font-weight:800;font-size:14px}
.unsupported{background:#e5e0d9;border:3px dashed #8a735f;border-radius:14px;padding:12px;color:#5d5044}
.unsupported b{display:block}
.err{background:#f5aaa2;border:3px solid var(--brown);border-radius:12px;padding:8px 12px;font-weight:800}

/* top bar + tabs (teacher) */
.topbar{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:12px;color:#fff}
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.tab{border:3px solid var(--brown);border-radius:12px;padding:9px 14px;min-height:44px;font-weight:900;background:#fff3d7;cursor:pointer;box-shadow:0 4px 0 var(--brown)}
.tab.on{background:linear-gradient(#ffd66b,#ffbd3d);transform:translateY(2px);box-shadow:0 2px 0 var(--brown)}
.conn{font-size:13px;font-weight:900;border-radius:999px;padding:3px 10px;border:2px solid var(--brown);background:#d9f5ef;color:var(--ink)}
.conn.offline{background:#f5aaa2}.conn.connecting{background:#ffe27d}

/* managers */
.two{display:grid;grid-template-columns:320px 1fr;gap:14px}
.list{display:flex;flex-direction:column;gap:8px}
.item{border:3px solid var(--brown);border-radius:14px;background:#fffaf0;padding:10px 12px;display:flex;align-items:center;gap:8px;justify-content:space-between;cursor:pointer}
.item.on{background:#ffe9a8}
.item .meta{font-size:13px;color:var(--muted)}
.item .t{font-weight:900;overflow-wrap:anywhere}
.setCards{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:12px}
.item input[type=radio],.item input[type=checkbox],.opt-row input[type=radio],.opt-row input[type=checkbox]{width:24px;height:24px;flex:none}
.opt-row{display:flex;gap:6px;align-items:center;margin:6px 0}
.opt-row input[type=text]{flex:1}
.roster{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:8px}
.stu{border:3px solid var(--brown);border-radius:13px;padding:10px;font-weight:900;text-align:center;background:#fffaf0;overflow-wrap:anywhere}
.stu.done{background:#d9f5ef}.stu.missing{background:#ffe2b9}.stu.offline{background:#e5e0d9}.stu.review{background:#ffe27d}
.stu small{display:block;font-weight:700;color:var(--muted)}

/* room / run */
.joinCode{font-size:clamp(48px,9vw,84px);font-weight:1000;letter-spacing:8px;text-align:center;line-height:1}
.qr{width:100%;max-width:220px;height:auto;border:4px solid var(--brown);border-radius:14px;background:#fff;display:block;margin:10px auto}
.run{display:grid;grid-template-columns:380px minmax(0,1fr);gap:14px}
.run>*{min-width:0}
.heroBtn{width:100%;font-size:21px;margin:6px 0}
.q-prompt{font-size:clamp(24px,3.4vw,40px);font-weight:1000;line-height:1.25;overflow-wrap:anywhere}
.timer{font-size:clamp(28px,4vw,48px);font-weight:1000;font-variant-numeric:tabular-nums}
.timer.low{color:#d03a2b}
.progress{height:18px;border:3px solid var(--brown);border-radius:999px;background:#fffaf0;overflow:hidden}
.progress>i{display:block;height:100%;background:linear-gradient(#86c878,#61a957);width:0;transition:width .2s}
table.res{width:100%;border-collapse:collapse;background:#fffaf0}
table.res th,table.res td{border:2px solid var(--brown);padding:7px 8px;text-align:left;vertical-align:top;overflow-wrap:anywhere}
table.res th{background:#ffe9a8}
.table-wrap{overflow-x:auto}
.room-title{color:#fff;text-shadow:0 2px 0 #0006}
.run>.wide,.run .wide{grid-column:1/-1}
.judge-table td{vertical-align:middle}
.judge-table .row{flex-wrap:wrap}
.judge-table .btn.small{white-space:nowrap}
.bulkbox{border:3px dashed var(--brown);border-radius:14px;padding:10px;background:#fff7e3}
.bulkrow{display:flex;gap:8px;align-items:center;flex-wrap:wrap;justify-content:space-between;padding:6px 0;border-top:2px dotted #cda96b}
.bulkrow:first-of-type{border-top:0}
.bulkrow .resp{font-weight:900;overflow-wrap:anywhere;flex:1;min-width:140px}
.verdict-correct{color:#2f7d32;font-weight:900}.verdict-incorrect{color:#b3261e;font-weight:900}
.bar{display:flex;align-items:center;gap:8px;margin:4px 0}
.bar .lbl{min-width:90px;font-weight:800}
.bar .track{flex:1;height:22px;border:2px solid var(--brown);border-radius:8px;background:#fffaf0;overflow:hidden}
.bar .track>i{display:block;height:100%;background:#35b7b2}
.bar .track>i.right{background:#61a957}
.warnbox{border:4px solid var(--red);background:#fff0df;border-radius:16px;padding:14px}

/* modal */
.overlay{position:fixed;inset:0;background:#001d2699;z-index:150;display:grid;place-items:center;padding:16px}
.modal{width:min(560px,96vw);max-height:92vh;overflow:auto}

/* student */
.studentWrap{max-width:820px;margin:auto}
.answerBoard{min-height:min(520px,calc(100vh - 140px));display:flex;flex-direction:column;justify-content:space-between;gap:12px}
.answerTitle{text-align:center;font-size:clamp(26px,5vw,46px);font-weight:1000;line-height:1.25;margin:12px 0;overflow-wrap:anywhere}
.qmini{text-align:center;font-weight:900;color:#765a45}
.ox-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.ox-btn{position:relative;border:4px solid var(--brown);border-radius:20px;min-height:150px;box-shadow:0 7px 0 var(--brown);cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;touch-action:manipulation}
.ox-btn.ox-o{background:#8fd8d3}.ox-btn.ox-x{background:#f5aaa2}
.ox-mark{font-size:72px;line-height:1}.ox-text{font-weight:1000;font-size:20px}
.choice-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.choice-btn{position:relative;overflow:hidden;border:4px solid var(--brown);border-radius:18px;min-height:130px;padding:12px;box-shadow:0 7px 0 var(--brown);cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;font-weight:1000;font-size:clamp(18px,3vw,26px);touch-action:manipulation;transition:transform .12s,box-shadow .12s}
.choice-btn.tone-0{background:#ffd86a}.choice-btn.tone-1{background:#8fd8d3}.choice-btn.tone-2{background:#f5aaa2}.choice-btn.tone-3{background:#b9db8d}
.choice-num{display:grid;place-items:center;width:64px;height:64px;border:4px solid var(--brown);border-radius:50%;background:#fff8e7;font-size:38px;box-shadow:0 5px 0 #6e5039}
.choice-text{overflow-wrap:anywhere;text-align:center}
.ox-btn:disabled,.choice-btn:disabled{cursor:default;opacity:.85}
.picked-tag{display:none;position:absolute;right:10px;top:8px;background:#38291f;color:#fff;border-radius:999px;padding:3px 10px;font-size:14px}
.picked{transform:translateY(5px) scale(.98);box-shadow:0 1px 0 var(--brown)!important;outline:7px solid #fff8d5}
.picked .picked-tag{display:block}
.answer-text{font-size:clamp(28px,6vw,44px);font-weight:900;text-align:center;border:4px solid var(--brown);border-radius:18px;padding:18px;min-height:90px}
.locked{display:grid;place-items:center;text-align:center;min-height:300px;gap:6px}
.lockIcon{font-size:84px}
.resultCard{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.resultBlock{border:3px solid var(--brown);border-radius:16px;padding:14px;background:#fffaf0;text-align:center}
.resultBlock .v{font-size:clamp(22px,4vw,36px);font-weight:1000;overflow-wrap:anywhere}
.resultBlock.good{background:#d9f5ef}.resultBlock.bad{background:#ffe2b9}
.nameGrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:10px}
.nameBtn{border:3px solid var(--brown);border-radius:14px;min-height:56px;padding:10px;font-weight:900;background:#fffaf0;box-shadow:0 4px 0 var(--brown);cursor:pointer;font-size:17px}
.nameBtn:disabled{background:#e5e0d9;opacity:.7;box-shadow:none;cursor:not-allowed}

/* display (electronic board) */
.presenter{min-height:100vh;display:grid;grid-template-rows:auto 1fr auto;gap:12px;padding:16px;max-width:1500px;margin:auto}
.presentQ{display:grid;place-items:center;text-align:center;padding:30px;gap:14px}
.presentQ .question{font-size:clamp(40px,6vw,86px);font-weight:1000;line-height:1.15;overflow-wrap:anywhere}
.d-choices{display:grid;grid-template-columns:1fr 1fr;gap:12px;width:100%}
.d-choice{border:4px solid var(--brown);border-radius:18px;padding:14px;font-size:clamp(22px,3.2vw,44px);font-weight:1000;background:#ffd86a;text-align:left}
.d-choice:nth-child(2){background:#8fd8d3}.d-choice:nth-child(3){background:#f5aaa2}.d-choice:nth-child(4){background:#b9db8d}
.d-choice.right{outline:8px solid #61a957}
.bigcode{font-size:clamp(40px,12vw,220px);max-width:100%;font-weight:1000;letter-spacing:.08em;color:var(--ink);line-height:1}
.display-lobby{max-width:100%;text-align:center;display:grid;gap:12px;place-items:center}
.display-lobby .qr{max-width:min(36vh,320px)}

/* controller (phone) */
.phone{max-width:430px;margin:auto}
.phone .paper{min-height:calc(100vh - 36px)}
.phoneStat{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:12px 0}
.phoneStat div{border:3px solid var(--brown);border-radius:13px;padding:10px;background:#fffaf0;text-align:center;font-weight:900}
.phoneStat .n{font-size:28px}
.pair-device{display:flex;justify-content:space-between;align-items:center;gap:8px;background:#d9f5ef;border:3px solid var(--brown);border-radius:12px;padding:10px;margin-top:10px}

#toasts{position:fixed;top:12px;left:50%;transform:translateX(-50%);z-index:300;display:grid;gap:8px;width:min(92vw,420px)}
.toast{background:#3a281d;color:#fff;border:3px solid #fff0c9;border-radius:13px;padding:10px 16px;font-weight:900;text-align:center}
.toast.error{background:#8a2b21}

@media(max-width:850px){
  .two,.run{grid-template-columns:minmax(0,1fr)}
  .setCards{grid-template-columns:1fr}
  .page{padding:12px}
}
@media(max-width:560px){
  .resultCard{grid-template-columns:1fr}
  .choice-btn{min-height:110px}
  .ox-btn{min-height:130px}
  .logo{font-size:34px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}
.foot{color:#d9f5ef;font-size:13px;margin:12px 4px}