*{box-sizing:border-box}body,html{margin:0;padding:0;color:#fff;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}body{position:relative;background:#2a0e61}body:after,body:before{content:"";position:fixed;inset:0;pointer-events:none}body:before{z-index:-2;background:radial-gradient(circle at 15% 20%,rgba(186,104,255,.35),transparent 45%),radial-gradient(circle at 85% 15%,rgba(99,33,173,.4),transparent 50%),radial-gradient(circle at 50% 90%,rgba(70,23,143,.5),transparent 55%),linear-gradient(135deg,#1d0a47,#46178f 45%,#6a23c2)}body:after{z-index:-1;background-image:repeating-linear-gradient(0deg,hsla(0,0%,100%,.06),hsla(0,0%,100%,.06) 1px,transparent 0,transparent 44px),repeating-linear-gradient(90deg,hsla(0,0%,100%,.06),hsla(0,0%,100%,.06) 1px,transparent 0,transparent 44px);background-size:44px 44px;animation:grid-drift 16s linear infinite}@keyframes grid-drift{0%{background-position:0 0}to{background-position:44px 44px}}a{color:inherit}.page{min-height:100vh;padding:24px}.page-center{display:flex;flex-direction:column;align-items:center;text-align:center;gap:12px;max-width:720px;margin:0 auto}.back-link{display:inline-block;margin-bottom:16px;text-decoration:none;opacity:.8}.title{font-size:2.5rem;margin:8px 0}.subtitle{font-size:1.1rem;opacity:.9;margin:4px 0}.section-title{font-size:1.5rem;margin:16px 0 8px}.button-row{display:flex;gap:16px;margin-top:24px;flex-wrap:wrap;justify-content:center}.btn{padding:14px 28px;font-size:1.1rem;font-weight:700;border:none;border-radius:8px;cursor:pointer;text-decoration:none;display:inline-block}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:#ffd602;color:#333}.btn-secondary{background:#2d9cdb;color:#fff}.file-input{margin:24px 0;padding:12px;background:#fff;color:#333;border-radius:8px}.error-box{background:rgba(255,0,0,.15);border:1px solid #ff6b6b;border-radius:8px;padding:16px;margin:16px 0;text-align:left}.error-text{color:#ffb3b3;font-weight:600}.success-text{color:#b3ffb3;font-weight:600}.form{display:flex;flex-direction:column;gap:12px;width:320px;margin-top:16px}.text-input{padding:12px 16px;font-size:1.1rem;border-radius:8px;border:none}.room-code{font-size:4rem;font-weight:800;letter-spacing:.2em;background:#fff;color:#46178f;border-radius:12px;padding:16px 32px;margin:16px 0}.player-list{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:8px;justify-content:center;max-width:600px}.player-list li{background:hsla(0,0%,100%,.15);padding:8px 16px;border-radius:20px}.question-text{font-size:1.8rem;margin:16px 0}.timer-bar-track{width:100%;max-width:500px;height:12px;background:hsla(0,0%,100%,.2);border-radius:6px;overflow:hidden;margin:8px 0}.timer-bar-fill{height:100%;background:#ffd602;transition:width 1s linear}.choice-grid{display:grid;grid-template-columns:1fr 1fr;grid-gap:12px;gap:12px;width:100%;max-width:600px;margin:16px 0}.choice-card{padding:24px 16px;border-radius:10px;font-size:1.2rem;font-weight:700;color:#fff;display:flex;align-items:center;justify-content:center;text-align:center;min-height:80px}.choice-button{border:none;cursor:pointer}.choice-button:disabled{cursor:not-allowed;opacity:.85}.choice-red{background:#e21b3c}.choice-blue{background:#1368ce}.choice-yellow{background:#d89e00}.choice-green{background:#26890c}.leaderboard{list-style:none;padding:0;width:100%;max-width:480px;margin:16px 0}.leaderboard li{display:flex;align-items:center;gap:16px;background:hsla(0,0%,100%,.12);border-radius:8px;padding:10px 16px;margin-bottom:8px;font-size:1.1rem}.leaderboard-rank{font-weight:800;width:24px}.leaderboard-name{flex:1 1;text-align:left}.leaderboard-score{font-weight:700}