:root{--purple:#632ca6;--ink:#1f1830;--red:#e21b3c;--blue:#1368ce;--yellow:#d89e00;--green:#26890c;--font:Tahoma,'Noto Sans Thai',system-ui,-apple-system,'Segoe UI',sans-serif}
*{box-sizing:border-box}
body{margin:0;min-height:100dvh;font-family:var(--font);color:#fff;background:radial-gradient(circle at 20% 10%,#7b3fc4,#46207e 55%,#2d1457)}
body.light{background:#f6f3fa;color:var(--ink)}
.wrap{max-width:1100px;margin:0 auto;padding:20px;display:flex;flex-direction:column;align-items:center;gap:18px;min-height:100dvh;justify-content:center}
.wrap.top{justify-content:flex-start}
h1{font-size:clamp(30px,6vw,60px);margin:0;text-align:center;line-height:1.1}
h2{margin:0}
.sub{opacity:.85;text-align:center;font-size:clamp(15px,2vw,20px)}
.card{background:#fff;color:var(--ink);border-radius:14px;padding:20px;width:100%;max-width:460px;box-shadow:0 8px 0 rgba(0,0,0,.2)}
.card.wide{max-width:none}
input,select,textarea{width:100%;font:inherit;font-size:18px;padding:12px;border:2px solid #d9cfe8;border-radius:10px;color:var(--ink);background:#fff}
input.code{text-align:center;font-size:28px;letter-spacing:6px}
input:focus,select:focus,textarea:focus{outline:3px solid #b58bdf}
label{display:block;font-size:13px;font-weight:700;margin:10px 0 4px;color:#5a4d70}
.btn{font:inherit;font-weight:700;font-size:18px;padding:12px 24px;border:0;border-radius:10px;background:#1f1830;color:#fff;cursor:pointer;box-shadow:0 4px 0 rgba(0,0,0,.35)}
.btn:active{transform:translateY(2px);box-shadow:0 2px 0 rgba(0,0,0,.35)}
.btn:disabled{opacity:.4;cursor:not-allowed}
.btn.big{width:100%;margin-top:14px}
.btn.alt{background:#fff;color:#2d1457}
.btn.pri{background:var(--purple)}
.btn.sm{font-size:14px;padding:6px 12px;box-shadow:0 2px 0 rgba(0,0,0,.3)}
.btn.danger{background:#b3261e}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.tag{background:rgba(255,255,255,.15);padding:6px 14px;border-radius:99px;font-weight:700;font-size:14px}
.err{color:#b3261e;font-weight:700;margin-top:10px;white-space:pre-wrap}
.lang{position:fixed;top:10px;right:10px;display:flex;gap:4px;background:rgba(0,0,0,.35);padding:4px;border-radius:10px;z-index:9}
.lang button{font:inherit;font-size:14px;font-weight:700;border:0;background:transparent;color:#fff;padding:6px 12px;border-radius:7px;cursor:pointer}
.lang button.on{background:#fff;color:var(--purple)}
.qbox{background:#fff;color:var(--ink);border-radius:14px;padding:22px 26px;width:100%;font-size:clamp(20px,3vw,34px);font-weight:700;text-align:center;line-height:1.35;box-shadow:0 6px 0 rgba(0,0,0,.2)}
.qbox.sm{font-size:clamp(17px,4.5vw,22px);padding:14px}
code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.85em;background:#f0e9f9;color:var(--ink);padding:2px 6px;border-radius:6px}
.ans{display:grid;grid-template-columns:1fr 1fr;gap:12px;width:100%}
.a{font:inherit;color:#fff;font-weight:700;font-size:clamp(15px,2.2vw,24px);text-align:left;border:0;border-radius:10px;padding:18px;display:flex;gap:14px;align-items:center;cursor:pointer;box-shadow:0 6px 0 rgba(0,0,0,.28);min-height:88px;line-height:1.3;position:relative;overflow:hidden}
.a .sh{font-size:30px;flex:none;width:34px;text-align:center}
.a .cnt{margin-left:auto;font-size:28px}
.a.c0{background:var(--red)}.a.c1{background:var(--blue)}.a.c2{background:var(--yellow)}.a.c3{background:var(--green)}
.a.dim{opacity:.25}.a.ok{outline:6px solid #fff}.a.mine{outline:4px dashed #ffd23f}
.a:disabled{cursor:default}
.a code{background:rgba(255,255,255,.25);color:#fff}
.ans.two .a{min-height:110px}
@media(max-width:640px){.ans{grid-template-columns:1fr}.a{min-height:64px;padding:14px}}
.bar{width:100%;height:14px;background:rgba(0,0,0,.3);border-radius:99px;overflow:hidden}
.bar>div{height:100%;width:100%;background:#ffd23f;transform-origin:left}
.score-xl{font-size:clamp(60px,14vw,150px);font-weight:800;line-height:1}
.roomcode{font-size:clamp(56px,13vw,140px);font-weight:800;letter-spacing:.08em}
.chips{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;max-width:900px}
.chip{background:rgba(255,255,255,.18);padding:8px 16px;border-radius:99px;font-weight:700}
.lb{width:100%;max-width:560px;display:flex;flex-direction:column;gap:8px}
.lbrow{display:flex;justify-content:space-between;background:#fff;color:var(--ink);padding:10px 16px;border-radius:10px;font-weight:700;font-size:18px}
.lbrow.me{outline:4px solid #ffd23f}
.lbrow span:first-child{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;padding-right:8px}
.exp{background:#fff;color:var(--ink);padding:16px 20px;border-radius:12px;max-width:760px;font-size:17px;line-height:1.6}
.verdict{font-size:clamp(32px,7vw,60px);font-weight:800;text-align:center}
.pts{font-size:24px;font-weight:700;background:rgba(0,0,0,.25);padding:8px 20px;border-radius:99px}
.ring{position:relative;width:150px;height:150px}
.ring svg{transform:rotate(-90deg)}
.ring .n{position:absolute;inset:0;display:grid;place-items:center;font-size:56px;font-weight:800}
.podium{display:flex;gap:14px;align-items:flex-end;justify-content:center;width:100%}
.pod{background:#fff;color:var(--ink);border-radius:12px 12px 0 0;padding:12px;min-width:150px;text-align:center;font-weight:800}
.pod .nm{font-size:22px;overflow:hidden;text-overflow:ellipsis;max-width:220px}
.pod.p1{height:230px;background:#ffd23f}.pod.p2{height:180px}.pod.p3{height:140px}
.qr{background:#fff;padding:10px;border-radius:12px;width:200px;height:200px}
/* admin */
.tabs{display:flex;gap:8px}
.tab{background:#e5dcf3;color:var(--ink)}
.tab.on{background:var(--purple);color:#fff}
table{width:100%;border-collapse:collapse;color:var(--ink);font-size:15px}
th,td{padding:8px;border-bottom:1px solid #e7e1ed;text-align:left;vertical-align:middle}
.qed{border:2px solid #e7e1ed;border-radius:12px;padding:12px;margin:10px 0}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.muted{color:#716a7c;font-size:14px}
.banner{background:#ffd23f;color:#3b2f00;padding:10px 16px;border-radius:10px;font-weight:700;width:100%}
.hidden{display:none!important}
.conn{position:fixed;left:50%;bottom:14px;transform:translateX(-50%);background:#b3261e;color:#fff;padding:8px 18px;border-radius:99px;font-weight:700;z-index:20}
.a.picked{outline:6px solid #fff;transform:scale(1.03);box-shadow:0 0 0 4px #ffd23f,0 6px 0 rgba(0,0,0,.28)}
.a .tick{margin-left:auto;font-size:34px}
.a.dim{opacity:.3}