*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:#fff;color:#111}h1,h2,h3{margin:0 0 .5rem;font-weight:700}.muted{color:#666}hr{border:none;border-top:1px solid #dddddd;margin:1.5rem 0}.page{max-width:720px;margin:0 auto;padding:24px 20px 60px}.center-page{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:24px}.back-link{display:inline-block;margin-bottom:16px;color:#111;text-decoration:none;font-weight:600}.back-link:hover{text-decoration:underline}.btn{display:inline-block;padding:12px 20px;border-radius:8px;border:2px solid #111111;background:#111;color:#fff;font-size:1rem;font-weight:600;cursor:pointer;text-decoration:none;text-align:center}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:#111;color:#fff}.btn-outline{background:#fff;color:#111}.btn-text{background:transparent;border:none;color:#666;text-decoration:underline;padding:8px}.button-stack{display:flex;flex-direction:column;gap:12px;margin-top:24px;width:100%;max-width:280px}.button-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:16px;align-items:center}.field-label{display:block;margin-top:16px;margin-bottom:6px;font-weight:600;font-size:.9rem}.text-input{width:100%;padding:12px;font-size:1rem;border:2px solid #111111;border-radius:6px;background:#fff;color:#111}.text-input-code{text-align:center;font-size:1.4rem;letter-spacing:4px;text-transform:uppercase}.join-form{width:100%;max-width:340px;text-align:left}.error-text{color:#b00020;font-weight:600;margin-top:10px}.quiz-list{margin-top:20px;display:flex;flex-direction:column;gap:12px}.quiz-card{border:2px solid #111111;border-radius:8px;padding:16px;display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}.question-card{border:2px solid #dddddd;border-radius:8px;padding:16px;margin-top:20px}.question-card-header{display:flex;justify-content:space-between;align-items:center}.option-row{display:flex;align-items:center;gap:10px;margin-bottom:8px}.option-row .text-input{flex:1}.timer{display:flex;align-items:center;gap:10px;margin:16px 0}.timer-bar-bg{flex:1;height:14px;border:2px solid #111111;border-radius:8px;overflow:hidden;background:#fff}.timer-bar-fill{height:100%;background:#111;transition:width .25s linear}.timer-number{font-weight:700;font-size:1.1rem;min-width:40px;text-align:right}.option-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:20px}@media (max-width: 480px){.option-grid{grid-template-columns:1fr}}.option-tile,.option-btn{border:2px solid #111111;border-radius:8px;padding:20px;font-size:1.1rem;text-align:left;background:#fff;color:#111}.option-btn{cursor:pointer;font-family:inherit}.option-btn:active{background:#111;color:#fff}.option-letter{font-weight:800;margin-right:8px}.typed-answer-form{display:flex;gap:10px;margin-top:20px}.typed-answer-form .text-input{flex:1}.answer-feedback{margin-top:24px;text-align:center}.result-correct{font-weight:700;font-size:1.3rem}.result-incorrect{font-weight:700;font-size:1.3rem;color:#666}.paused-banner{display:inline-block;border:2px solid #111111;border-radius:6px;padding:6px 14px;font-weight:700;margin:10px 0}.qr-box{display:flex;flex-direction:column;align-items:center;gap:10px;margin:16px 0}.qr-white-card{background:#fff;padding:12px;border:2px solid #111111;border-radius:8px;display:inline-block}.qr-link{font-size:.85rem;color:#666;word-break:break-all;text-align:center}.leaderboard ol{list-style:none;padding:0;margin:20px 0 0;display:flex;flex-direction:column;gap:8px}.leaderboard-row{display:flex;align-items:center;gap:16px;border:2px solid #111111;border-radius:8px;padding:12px 16px;font-size:1.2rem}.leaderboard-row .rank{font-weight:800;width:40px}.leaderboard-row .name{flex:1;font-weight:600}.leaderboard-row .score{font-weight:800}.control-links{margin-top:16px}.control-question{margin-top:24px}.display-page{max-width:1000px;text-align:center;padding-top:48px}.session-code-big{font-size:3rem;letter-spacing:8px;margin-top:8px}.display-question{font-size:2.4rem;margin:20px 0}@media (min-width: 900px){.display-question{font-size:3rem}.option-tile{font-size:1.6rem;padding:28px}}