@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');
:root{--purple:#ae00ec;--purple-hover:#9500cb;--purple-pale:#f6e6fe;--page:#f7f7fa;--white:#fff;--ink:#171923;--muted:#747987;--line:#e7eaf0;--success:#168653;--success-bg:#eaf8f0;--danger:#c9364b;--danger-bg:#fff0f2;--radius:9px}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;font-family:Inter,Arial,sans-serif;color:var(--ink)}body{min-height:100vh;background:var(--page);display:flex;flex-direction:column}a{color:inherit}
.navbar{height:64px;width:100%;padding:0 36px;display:flex;align-items:center;gap:20px;background:#fff;border-bottom:1px solid #ececf1;flex:none}.nav-logo{display:flex;align-items:center;gap:8px;text-decoration:none;color:#24252a}.logo-tiles{width:28px;height:28px;display:grid;grid-template-columns:repeat(2,10px);grid-template-rows:repeat(2,10px);gap:4px;align-content:center}.logo-tiles span{border:1.7px solid #28292d;border-radius:0}.logo-tiles span:nth-child(2){background:#28292d}.logo-tiles span:nth-child(3){background:#28292d}.logo-wordmark{display:flex;flex-direction:column;line-height:1}.logo-wordmark .l1{font-size:11px;font-weight:800;letter-spacing:.1px}.logo-wordmark .l2{font-size:7px;letter-spacing:1.1px;color:#5f626b;font-weight:700;margin-top:3px}.nav-spacer{flex:1}.nav-link{font-size:12px;font-weight:600;color:#777d8b;text-decoration:none}.nav-link:hover{color:var(--purple)}
.page-wrap{width:100%;max-width:1120px;margin:0 auto;flex:1;padding:22px 24px 64px;display:flex;flex-direction:column;align-items:center}.page-heading{width:100%;text-align:center;margin:30px 0 30px}.page-heading h1{font-size:30px;line-height:1.25;letter-spacing:-.7px;font-weight:800;margin:0 0 8px}.page-heading p{font-size:13px;color:var(--muted);margin:0;line-height:1.6}
.card{width:100%;max-width:404px;padding:28px 29px 30px;background:var(--white);border:0;border-radius:16px;box-shadow:0 1px 2px rgba(20,20,40,.03);}.card.card-wide{max-width:760px;padding:32px}.card-title,h1.card-title{font-size:25px;line-height:1.25;font-weight:800;letter-spacing:-.6px;margin:0 0 26px;color:#111}.card-title.center{text-align:center}.card-description{font-size:13px;line-height:1.6;color:var(--muted);margin:-9px 0 20px}.eyebrow{font-size:10px;letter-spacing:1px;font-weight:700;color:var(--purple);margin-bottom:8px}
label{display:block;font-size:13px;font-weight:600;color:#454955;margin:14px 0 7px}input[type=text],input[type=email],input[type=password],textarea{width:100%;height:38px;padding:0 14px;border:1px solid #eceef5;border-radius:8px;background:#f1f3fb;color:var(--ink);font:500 14px Inter,Arial,sans-serif;outline:none;transition:border-color .15s,background .15s}textarea{height:auto;min-height:240px;padding:13px;resize:vertical;font:12px/1.6 Consolas,monospace}input::placeholder,textarea::placeholder{color:#a0a5b0}input:focus,textarea:focus{border-color:var(--purple);background:#fff;box-shadow:0 0 0 3px rgba(174,0,236,.10)}
button.btn-primary{width:100%;min-height:38px;margin-top:24px;padding:10px 16px;border:0;border-radius:8px;background:var(--purple);color:#fff;font:700 13px Inter,Arial,sans-serif;cursor:pointer;transition:background .15s}button.btn-primary:hover:not(:disabled){background:var(--purple-hover)}button.btn-primary:disabled{background:#d9b6e5;cursor:not-allowed}.link-row{text-align:center;margin-top:17px}.link-row a,.text-link{color:var(--purple);font-size:14px;font-weight:600;text-decoration:none}.error-box{display:none;margin-top:14px;padding:10px 12px;border:1px solid #ffd2d9;border-radius:6px;background:var(--danger-bg);color:var(--danger);font-size:12px;line-height:1.5}.hidden{display:none!important}.page-footer-note{max-width:500px;margin:23px auto 0;text-align:center;color:#858b98;font-size:11px;line-height:1.6}.page-footer-note a{color:var(--purple);text-decoration:none}
.cards{width:100%;display:flex;justify-content:center;flex-wrap:wrap;gap:14px}.role-card{width:310px;min-height:150px;padding:24px;background:#fff;border:1px solid transparent;border-radius:16px;box-shadow:none;text-align:left;text-decoration:none;color:var(--ink);transition:border-color .15s,background .15s}.role-card:hover{border-color:var(--purple);background:#fff}.role-mark{width:32px;height:32px;display:flex;align-items:center;justify-content:center;border:0;border-radius:8px;background:var(--purple-pale);color:var(--purple);font-size:11px;font-weight:700;margin-bottom:15px}.role-title{font-size:16px;font-weight:700;margin-bottom:6px}.role-desc{font-size:12.5px;line-height:1.55;color:var(--muted)}
.room-code-box{padding:22px;margin:0 0 24px;text-align:center;border:0;border-radius:12px;background:var(--purple-pale)}.room-code-label{font-size:11px;color:var(--muted);font-weight:600;margin-bottom:8px}.room-code{font-size:40px;font-weight:700;letter-spacing:7px;color:var(--purple);font-variant-numeric:tabular-nums}.sub-heading{font-size:13px;font-weight:700;margin:0 0 12px;color:#393d47}.students-list{list-style:none;padding:0;margin:0}.students-list li{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:12px 14px;margin-bottom:8px;border:0;border-radius:8px;background:#f7f7fb;background:#fff;font-size:12px}.student-meta{font-size:11px;color:var(--muted)}.online-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:#20a46a;margin-right:9px}.empty-hint{text-align:center;color:var(--muted);font-size:12px;padding:20px 0;line-height:1.6}
.progress-row{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:17px;font-size:12px;color:var(--muted);font-weight:600}.progress-badge{padding:6px 10px;border-radius:5px;background:var(--purple-pale);color:var(--purple);font-size:11px;font-weight:700}.timer-badge{font-weight:700;color:#555b67}.question-text{font-size:20px;line-height:1.45;font-weight:700;text-align:center;margin:24px 0 25px;letter-spacing:-.25px}.answered-count{text-align:center;color:var(--muted);font-size:12px}.timer-bar-track{width:100%;height:4px;border-radius:10px;background:#eceef3;overflow:hidden;margin-bottom:22px}.timer-bar-fill{height:100%;width:100%;background:var(--purple);transition:width 1s linear}.options-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.option-btn{min-height:58px;padding:13px 14px;border:1px solid #e9ebf3;border-radius:10px;background:#fff;color:var(--ink);font:600 13px/1.5 Inter,Arial,sans-serif;text-align:left;cursor:pointer;transition:border-color .15s,background .15s}.option-btn:hover:not(:disabled){border-color:#d9a0ec;background:#fdfaff}.option-btn:disabled{cursor:not-allowed;opacity:.72}.option-btn.selected{border-color:var(--purple);background:var(--purple-pale);box-shadow:inset 0 0 0 1px var(--purple)}
.feedback-box{display:none;margin-top:17px;padding:12px;border-radius:6px;text-align:center;font-size:12px;font-weight:700}.feedback-box.correct{display:block;background:var(--success-bg);color:var(--success)}.feedback-box.incorrect{display:block;background:var(--danger-bg);color:var(--danger)}.feedback-box.timeout{display:block;background:#f0f1f4;color:var(--muted)}.waiting-wrap{text-align:center;padding:7px 0}.wave{display:none}.greeting{font-size:18px;font-weight:700;margin-bottom:7px}.meta-line{font-size:12px;color:var(--muted)}.room-pill{display:inline-block;margin-top:17px;padding:8px 15px;border-radius:5px;background:var(--purple-pale);color:var(--purple);font-size:13px;font-weight:700;letter-spacing:2px}.spinner{width:22px;height:22px;margin:26px auto 11px;border:2px solid #eee7f2;border-top-color:var(--purple);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.waiting-hint{font-size:12px;color:var(--muted);margin-top:8px}.final-score{text-align:center;margin:8px 0 24px}.final-score .score-num{font-size:43px;font-weight:700;color:var(--purple);font-variant-numeric:tabular-nums}.final-score .score-rank{font-size:12px;color:var(--muted);margin-top:4px}table.leaderboard{width:100%;border-collapse:collapse;margin-top:10px}table.leaderboard th,table.leaderboard td{padding:12px 10px;border-bottom:1px solid var(--line);text-align:left;font-size:12px}table.leaderboard th{font-size:10px;letter-spacing:.35px;text-transform:uppercase;color:#888e9a;font-weight:700}table.leaderboard tr:first-child td{color:var(--purple);font-weight:700}
@media(max-width:640px){.navbar{height:56px;padding:0 16px}.page-wrap{padding:35px 14px 44px}.page-heading h1{font-size:23px}.page-heading{margin-bottom:23px}.card,.card.card-wide{padding:23px 18px}.card-title,h1.card-title{font-size:20px}.role-card{width:100%;max-width:420px;min-height:0;padding:18px}.options-grid{grid-template-columns:1fr}.question-text{font-size:18px}.room-code{font-size:35px;letter-spacing:5px}table.leaderboard th,table.leaderboard td{padding:9px 5px;font-size:10px}}

.logo-img{height:40px;width:auto;display:block}.nav-link{font-size:13px}@media(max-width:640px){.logo-img{height:34px}}

#btn-next-question{background:#fff;color:var(--purple);box-shadow:inset 0 0 0 1.5px var(--purple)}#btn-next-question:hover:not(:disabled){background:var(--purple-pale)}#btn-next-question.all-answered{background:var(--purple);color:#fff;box-shadow:none}#btn-next-question.all-answered:hover:not(:disabled){background:var(--purple-hover)}
.avatar{--s:36px;width:var(--s);height:var(--s);border-radius:50%;overflow:hidden;flex:none;display:inline-flex;align-items:center;justify-content:center;background:var(--purple-pale)}.avatar img{width:100%;height:100%;object-fit:cover;display:block}.avatar-initials{color:var(--purple);font-weight:700;font-size:calc(var(--s)*.42)}
.who{display:inline-flex;align-items:center;gap:10px;min-width:0}
.avatar-picker{display:flex;flex-direction:column;align-items:center;margin:0 0 6px}.avatar-main{position:relative;width:96px;height:96px}.avatar-ring{width:96px;height:96px;border-radius:50%;padding:6px;background:linear-gradient(135deg,var(--purple),#ff5fa2);display:flex;align-items:center;justify-content:center}.avatar-ring .avatar{border:3px solid #fff;box-sizing:content-box;--s:84px}
.avatar-upload{position:absolute;right:-2px;bottom:-2px;width:30px;height:30px;border-radius:50%;border:3px solid #fff;background:var(--purple);color:#fff;font:700 18px/1 Inter,Arial,sans-serif;cursor:pointer;padding:0;display:flex;align-items:center;justify-content:center}.avatar-upload:hover{background:var(--purple-hover)}
.avatar-hint{font-size:12px;color:var(--muted);margin:12px 0 10px;text-align:center}.avatar-grid{display:grid;grid-template-columns:repeat(8,1fr);gap:6px;width:100%}.avatar-choice{padding:2px;border:2px solid transparent;border-radius:50%;background:none;cursor:pointer;display:flex;justify-content:center}.avatar-choice .avatar{--s:100%;width:100%;height:auto;aspect-ratio:1}.avatar-choice:hover{border-color:#e3b3f6}.avatar-choice.active{border-color:var(--purple)}
.teacher-line{margin-top:14px;font-size:12px;color:var(--muted);display:flex;justify-content:center;align-items:center;gap:8px}.waiting-avatar{display:flex;justify-content:center;margin-bottom:12px}
table.leaderboard td .who{font-weight:600}
@media(max-width:640px){.avatar-grid{grid-template-columns:repeat(4,1fr)}.avatar-choice .avatar{--s:100%}}