:root{
 --bg:#050914;--panel:#0a1221;--panel2:#0f1a2c;--line:rgba(101,198,255,.18);
 --line2:rgba(101,198,255,.46);--text:#f4f8ff;--muted:#8ba1b7;--blue:#4fc4ff;
 --cyan:#00e0ff;--green:#72f6bd;--amber:#ffd166;--red:#ff7488;--violet:#bd8cff;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:radial-gradient(circle at 20% 0,rgba(38,133,255,.16),transparent 25%),radial-gradient(circle at 90% 12%,rgba(189,140,255,.07),transparent 20%),var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif;min-height:100vh}
button{font:inherit}
.topbar{position:sticky;top:0;z-index:20;display:flex;justify-content:space-between;align-items:center;padding:13px clamp(14px,4vw,48px);border-bottom:1px solid var(--line);background:rgba(5,9,20,.9);backdrop-filter:blur(14px)}
.brand{display:flex;align-items:center;gap:12px}.brand span{font-size:10px;letter-spacing:.14em;color:#77cfff;font-weight:800}.brand h1{font-size:20px;margin:2px 0 0}
.mark{width:40px;height:40px;display:grid;place-items:center;border:1px solid var(--line2);border-radius:11px;color:var(--cyan);font-weight:900;box-shadow:inset 0 0 20px rgba(79,196,255,.08)}
.top-actions{display:flex;gap:8px}.btn{border:1px solid transparent;border-radius:10px;padding:10px 14px;font-weight:800;cursor:pointer;transition:.18s transform,.18s border-color,.18s opacity}.btn:hover:not(:disabled){transform:translateY(-1px)}.btn.primary{background:linear-gradient(135deg,var(--blue),var(--cyan));color:#02121b}.btn.ghost{background:rgba(255,255,255,.025);border-color:var(--line);color:#d5e6f5}.btn:disabled{opacity:.42;cursor:not-allowed}
.shell{width:min(1160px,calc(100% - 24px));margin:26px auto 50px}
.hero{display:grid;grid-template-columns:1.4fr .6fr;gap:18px;padding:30px;border:1px solid var(--line);border-radius:20px;background:linear-gradient(135deg,rgba(14,24,41,.96),rgba(7,13,25,.95));box-shadow:0 18px 60px rgba(0,0,0,.25)}
.kicker{font-size:11px;letter-spacing:.13em;color:#73ccff;font-weight:900}.hero h2{font-size:clamp(38px,6vw,68px);line-height:1;margin:10px 0 12px;letter-spacing:-.04em}.hero h2 em{font-style:normal;color:var(--blue)}.hero p{color:#a9bdd1;line-height:1.65;max-width:760px}
.scorebox{border-left:1px solid var(--line);display:grid;place-items:center}.scorecircle{width:176px;height:176px;border-radius:50%;border:12px solid rgba(79,196,255,.12);display:grid;place-items:center;box-shadow:inset 0 0 40px rgba(0,224,255,.06),0 0 42px rgba(0,224,255,.04)}.scorecircle strong{font-size:42px}.scorecircle span{display:block;text-align:center;color:var(--muted);font-size:10px;letter-spacing:.12em}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:14px 0 28px}.stat{border:1px solid var(--line);border-radius:14px;background:rgba(10,18,33,.78);padding:16px}.stat span{font-size:10px;letter-spacing:.12em;color:#73c9f7;font-weight:900}.stat strong{display:block;font-size:22px;margin-top:7px}.stat small{color:var(--muted)}
.bandhead{margin:30px 0 10px}.bandhead h3{font-size:28px;margin:3px 0}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.card{border:1px solid var(--line);border-radius:15px;background:linear-gradient(145deg,rgba(15,25,43,.95),rgba(8,14,26,.96));padding:17px;min-height:235px;display:flex;flex-direction:column;transition:.2s}.card.available:hover{transform:translateY(-2px);border-color:var(--line2);box-shadow:0 12px 30px rgba(0,0,0,.18)}.card.locked{opacity:.44}.card.complete{border-color:rgba(114,246,189,.36)}
.card-top{display:flex;justify-content:space-between;font-size:10px;letter-spacing:.1em;color:#71889f;font-weight:900}.bandpill{border:1px solid var(--line);border-radius:999px;padding:5px 7px}
.card h4{font-size:21px;margin:17px 0 7px}.card p{font-size:13px;color:var(--muted);line-height:1.5}.card-actions{margin-top:auto;padding-top:16px;display:flex;justify-content:space-between;align-items:end;gap:10px}.state{font-size:11px;color:#7d95aa}.state.good{color:var(--green)}.state.open{color:var(--blue)}
.rounds{display:flex;gap:6px;margin-top:13px}.round-dot{height:7px;flex:1;border-radius:999px;background:rgba(255,255,255,.07)}.round-dot.pass{background:var(--green)}.round-dot.open{background:rgba(79,196,255,.48)}
.quiz-shell{width:min(900px,calc(100% - 24px));margin:30px auto 60px}.quiz-top{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:14px}.crumb{color:#74cfff;font-size:11px;font-weight:900;letter-spacing:.12em}.progressbar{height:7px;background:rgba(255,255,255,.06);border-radius:999px;overflow:hidden;margin:14px 0 24px}.progressbar i{display:block;height:100%;background:linear-gradient(90deg,var(--blue),var(--cyan));width:0}
.question-card{border:1px solid var(--line);border-radius:20px;background:linear-gradient(145deg,rgba(15,25,43,.96),rgba(8,14,26,.98));padding:clamp(20px,4vw,34px);box-shadow:0 18px 50px rgba(0,0,0,.22)}.qnum{font-size:11px;letter-spacing:.13em;color:#7ecfff;font-weight:900}.question-card h2{font-size:clamp(25px,4vw,36px);line-height:1.2;margin:10px 0 24px}.choices{display:grid;gap:10px}.choice{width:100%;text-align:left;border:1px solid var(--line);background:rgba(255,255,255,.02);color:var(--text);border-radius:12px;padding:15px;cursor:pointer}.choice:hover:not(:disabled){border-color:var(--line2);background:rgba(79,196,255,.05)}.choice.correct{border-color:rgba(114,246,189,.7);background:rgba(114,246,189,.08)}.choice.wrong{border-color:rgba(255,116,136,.7);background:rgba(255,116,136,.07)}
.feedback{margin-top:18px;border-left:3px solid var(--blue);padding:12px 14px;background:rgba(79,196,255,.05);color:#b8cce0;line-height:1.55}.feedback.good{border-left-color:var(--green)}.feedback.bad{border-left-color:var(--red)}.quiz-nav{display:flex;justify-content:flex-end;margin-top:18px}
.results{width:min(760px,calc(100% - 24px));margin:50px auto;border:1px solid var(--line);border-radius:22px;padding:32px;background:linear-gradient(145deg,rgba(15,25,43,.96),rgba(8,14,26,.98));text-align:center}.results .big{font-size:72px;font-weight:950;letter-spacing:-.05em}.pass{color:var(--green)}.fail{color:var(--amber)}.results p{color:var(--muted);line-height:1.6}.results .actions{display:flex;justify-content:center;gap:10px;margin-top:20px;flex-wrap:wrap}
.note{font-size:11px;color:#607991;line-height:1.45;margin-top:10px}
@media(max-width:850px){.hero{grid-template-columns:1fr}.scorebox{border-left:0;border-top:1px solid var(--line);padding-top:18px}.stats{grid-template-columns:repeat(2,1fr)}.grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.top-actions #homeBtn{display:none}.shell{margin-top:14px}.hero{padding:20px}.hero h2{font-size:42px}.grid{grid-template-columns:1fr}.stats{grid-template-columns:1fr 1fr}.quiz-top{align-items:flex-start;flex-direction:column}.card{min-height:210px}}