:root{
  --navy:#091a4a;--navy2:#112866;--blue:#2f6df6;--purple:#7a3ff2;--coral:#ff5a67;
  --green:#2fbf71;--orange:#ff9b32;--bg:#f5f7fc;--card:#ffffff;--text:#14213d;--muted:#7180a0;
  --border:#e3e8f2;--shadow:0 16px 45px rgba(19,34,72,.12);--radius:22px
}
*{box-sizing:border-box}body{margin:0;font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text)}
a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}button{cursor:pointer}
.shell{min-height:100vh;background:linear-gradient(135deg,#07183f 0%,#102b72 55%,#351b70 100%)}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 28px;color:#fff;border-bottom:1px solid rgba(255,255,255,.1)}
.brand{font-size:30px;font-weight:900;letter-spacing:-1px}.brand span{background:linear-gradient(90deg,#53a3ff,#ff6d95,#a163ff);-webkit-background-clip:text;background-clip:text;color:transparent}.brand small{display:block;font-size:12px;font-weight:600;opacity:.7;letter-spacing:.3px}
.content{max-width:1280px;margin:0 auto;padding:28px}.grid{display:grid;gap:20px}.grid-2{grid-template-columns:minmax(0,1fr) 320px}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}.card-pad{padding:24px}.subtle{color:var(--muted)}
.btn{border:0;border-radius:14px;padding:12px 18px;font-weight:800;display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px}.btn-primary{color:#fff;background:linear-gradient(135deg,var(--blue),var(--purple))}.btn-danger{color:#fff;background:var(--coral)}.btn-light{background:#fff;border:1px solid var(--border);color:var(--text)}.btn-success{background:var(--green);color:#fff}.btn:disabled{opacity:.45;cursor:not-allowed}
.input,.textarea,.select{width:100%;border:1px solid #d8deeb;border-radius:13px;background:#fff;padding:12px 14px;outline:none}.input:focus,.textarea:focus,.select:focus{border-color:#6b8cff;box-shadow:0 0 0 4px rgba(47,109,246,.1)}.textarea{min-height:110px;resize:vertical}.label{display:block;font-size:13px;font-weight:800;margin:0 0 7px}.field{margin-bottom:16px}
.join-wrap{min-height:100vh;display:grid;place-items:center;padding:20px;background:radial-gradient(circle at 20% 0%,#d7ddff 0,transparent 35%),radial-gradient(circle at 100% 100%,#ffd7e0 0,transparent 28%),#f7f8fd}.join-card{width:min(460px,100%);padding:30px}.logo-large{font-size:42px;font-weight:950;letter-spacing:-1.5px;margin-bottom:6px}.logo-large span{background:linear-gradient(90deg,#316df6,#ff5f87,#7439ef);-webkit-background-clip:text;background-clip:text;color:transparent}.join-title{font-size:28px;margin:24px 0 8px}.error{padding:12px 14px;border-radius:12px;background:#fff0f1;color:#a62430;margin-bottom:15px}
.admin-wrap{display:grid;grid-template-columns:230px 1fr;min-height:100vh}.sidebar{background:#fff;border-right:1px solid var(--border);padding:24px 16px}.sidebar .brand{color:var(--navy);margin-bottom:28px}.nav-link{display:block;padding:11px 12px;border-radius:11px;margin:5px 0;font-weight:700;color:#45516c}.nav-link.active,.nav-link:hover{background:#edf2ff;color:#245eea}.admin-main{padding:28px}.page-head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:22px}.page-head h1{margin:0;font-size:30px}.session-list{display:grid;gap:14px}.session-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px;border:1px solid var(--border);border-radius:16px;background:#fff}.badge{display:inline-flex;padding:6px 10px;border-radius:999px;font-size:12px;font-weight:800}.badge-live{background:#e5f8ed;color:#168047}.badge-draft{background:#eef1f6;color:#62708a}.badge-finished{background:#eee9ff;color:#6547b4}
.question-list{display:grid;gap:10px}.question-item{display:grid;grid-template-columns:42px 120px 1fr auto;gap:12px;align-items:center;padding:14px 16px;border:1px solid var(--border);border-radius:15px;background:#fff}.qnum{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:#edf2ff;font-weight:900}.qtype{font-weight:800;font-size:13px;color:#4b5d84}.qtext{font-weight:750}.actions{display:flex;gap:8px;flex-wrap:wrap}.small{padding:8px 10px;min-height:36px;border-radius:10px;font-size:13px}
.presenter-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:20px}.question-card{padding:28px}.question-meta{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:16px}.question-title{font-size:34px;line-height:1.15;margin:8px 0 24px;letter-spacing:-.7px}.option-row{display:grid;grid-template-columns:52px 1fr 90px;gap:12px;align-items:center;margin:12px 0}.letter{width:44px;height:44px;border-radius:13px;display:grid;place-items:center;font-size:22px;font-weight:900;background:#eef2ff}.bar{height:42px;border-radius:12px;background:#edf0f6;overflow:hidden;position:relative}.bar>span{position:absolute;inset:0 auto 0 0;border-radius:12px;background:linear-gradient(90deg,#4d80ff,#8446ef);min-width:2px}.bar-label{position:relative;z-index:1;padding:11px 14px;font-weight:800}.metric{text-align:right;font-weight:900}.join-panel{padding:20px;text-align:center}.join-panel img{width:180px;max-width:100%;border-radius:12px}.join-code{font-size:28px;font-weight:950;letter-spacing:2px}.metrics{display:flex;gap:12px;flex-wrap:wrap}.metric-pill{padding:10px 14px;border-radius:12px;background:rgba(255,255,255,.1);color:#fff;font-weight:800}.controlbar{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}.controlbar .btn{flex:1;min-width:150px}.presenter-tabs{display:flex;gap:8px;margin-bottom:16px}.presenter-tabs a{padding:10px 14px;border-radius:12px;background:rgba(255,255,255,.1);color:#fff;font-weight:800}.presenter-tabs a.active{background:#fff;color:var(--navy)}
.phone-wrap{min-height:100vh;background:#fafbff;padding:18px}.phone{max-width:520px;margin:0 auto}.mobile-brand{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.mobile-brand strong{font-size:24px}.mobile-card{background:#fff;border:1px solid var(--border);border-radius:22px;padding:22px;box-shadow:0 12px 35px rgba(34,50,92,.1)}.mobile-q{font-size:28px;line-height:1.2;margin:6px 0 20px}.answer-btn{width:100%;display:flex;align-items:center;gap:14px;border:0;border-radius:16px;padding:17px;margin:11px 0;text-align:left;font-weight:800;font-size:17px;background:#eef3ff;color:#1d2c55}.answer-btn:nth-of-type(2){background:#eafaf0}.answer-btn:nth-of-type(3){background:#fff2e3}.answer-btn:nth-of-type(4){background:#f3ebff}.answer-btn.selected{outline:3px solid #2f6df6}.answer-letter{width:42px;height:42px;border-radius:12px;background:#fff;display:grid;place-items:center;font-size:20px}.waiting{text-align:center;padding:34px 10px}.waiting .orb{width:86px;height:86px;border-radius:50%;margin:0 auto 18px;background:linear-gradient(135deg,#dbe6ff,#efdfff);display:grid;place-items:center;font-size:36px}.group-banner{background:linear-gradient(135deg,#6f3ff2,#405ef5);color:#fff;padding:14px 16px;border-radius:15px;margin:0 0 14px;font-weight:800}.score-chip{padding:8px 11px;background:#edf2ff;border-radius:999px;font-weight:800}
.result-good{padding:16px;border-radius:15px;background:#eaf9f0;color:#167743;margin-top:16px;font-weight:700}.explain{padding:16px;border-radius:15px;background:#f1ebff;color:#4d3c94;margin-top:12px}.open-responses{display:grid;gap:9px}.quote{padding:12px 14px;border-radius:12px;background:#f7f8fc;border:1px solid var(--border)}.word-cloud{display:flex;gap:12px;flex-wrap:wrap;align-items:center;justify-content:center;padding:24px}.word-cloud span{font-weight:900;color:#4b52a9}
.wheel-layout{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:22px}.wheel-card{padding:24px;text-align:center}.wheel-stage{position:relative;display:grid;place-items:center;min-height:440px}.wheel{width:min(390px,82vw);aspect-ratio:1;border-radius:50%;border:12px solid #fff;box-shadow:0 14px 34px rgba(22,34,72,.18);transition:transform 4s cubic-bezier(.1,.7,.1,1);position:relative;overflow:hidden;background:conic-gradient(#486ef3 0 60deg,#7d49eb 60deg 120deg,#ff6f85 120deg 180deg,#ffad40 180deg 240deg,#39bd7a 240deg 300deg,#58a6ff 300deg 360deg)}.wheel:after{content:"EduQuiz";position:absolute;inset:36%;display:grid;place-items:center;background:#fff;border-radius:50%;font-weight:950;color:#14213d}.pointer{position:absolute;top:8px;left:50%;transform:translateX(-50%);width:0;height:0;border-left:18px solid transparent;border-right:18px solid transparent;border-top:34px solid #ff4d61;z-index:2}.winner{font-size:26px;font-weight:950;margin:16px 0}.groups-panel{padding:20px}.group-card{padding:13px 14px;border-radius:14px;background:#f6f7fc;margin:10px 0}.group-card strong{display:block;margin-bottom:6px}
@media(max-width:900px){.grid-2,.presenter-layout,.wheel-layout{grid-template-columns:1fr}.admin-wrap{grid-template-columns:1fr}.sidebar{display:none}.grid-3{grid-template-columns:1fr}.question-item{grid-template-columns:38px 1fr auto}.qtype{display:none}.content,.admin-main{padding:18px}.topbar{padding:14px 18px;align-items:flex-start;flex-direction:column}.question-title{font-size:27px}.presenter-layout .join-panel{order:-1}.join-panel img{width:130px}}
@media(max-width:560px){.question-item{grid-template-columns:36px 1fr}.question-item .actions{grid-column:1/-1}.option-row{grid-template-columns:44px 1fr}.metric{grid-column:2}.page-head{align-items:flex-start;flex-direction:column}.mobile-q{font-size:24px}.join-card{padding:22px}.logo-large{font-size:36px}}