:root{--bg:#f4f6f8;--surface:#fff;--ink:#1f2937;--muted:#667085;--line:#dfe3e8;--blue:#1d4ed8;--blue-dark:#173fa8;--blue-soft:#eff6ff;--danger:#b42318;--danger-soft:#fff1f0}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.55 Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;min-height:100vh}.shell{width:min(100% - 40px,1120px);margin:0 auto;padding:42px 0 64px}.hero{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;padding:0 0 25px;border-bottom:1px solid var(--line);margin-bottom:28px}.eyebrow{font-size:.72rem;font-weight:750;letter-spacing:.1em;color:var(--muted);margin:0 0 6px}.hero h1{font-size:2rem;letter-spacing:-.035em;line-height:1.1;margin:0}.subtitle{color:var(--muted);margin:7px 0 0}h2,h3{letter-spacing:-.02em}h2{font-size:1.35rem;line-height:1.25;margin:0 0 7px}h3{font-size:1rem;margin:0 0 14px}.card{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:24px;box-shadow:0 1px 2px rgba(16,24,40,.04)}.student-card{width:min(100%,600px);margin:clamp(44px,12vh,130px) auto 0;text-align:center}.student-card p{color:var(--muted);max-width:470px;margin-left:auto;margin-right:auto}.badge{display:inline-flex;background:var(--blue-soft);border:1px solid #dbeafe;color:#1e40af;font-size:.76rem;font-weight:700;border-radius:4px;padding:5px 8px;margin-bottom:20px}.icon-circle{display:grid;place-items:center;width:40px;height:40px;margin:0 auto 14px;border:1px solid #bfdbfe;background:var(--blue-soft);color:var(--blue);font-size:1.1rem;font-weight:800}form{text-align:left;margin-top:20px}label{font-size:.84rem;font-weight:700;display:block;margin:14px 0 6px}input,textarea{width:100%;font:inherit;color:var(--ink);background:#fff;border:1px solid #bfc6d1;border-radius:5px;padding:10px 11px;outline:0}textarea{min-height:110px;resize:vertical}input:focus,textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px #dbeafe}button,.button-link{font:inherit;font-size:.9rem;font-weight:700;line-height:1.25;border:1px solid transparent;border-radius:5px;padding:10px 13px;cursor:pointer;transition:background .15s,border-color .15s,color .15s;text-decoration:none;display:inline-block;text-align:center}button:disabled{opacity:.55;cursor:not-allowed}.primary{background:var(--blue);color:#fff}.primary:hover:not(:disabled){background:var(--blue-dark)}.secondary{background:var(--blue-soft);border-color:#bfdbfe;color:#1e40af}.secondary:hover{background:#dbeafe}.ghost{background:#fff;border-color:#cbd2dc;color:#344054}.ghost:hover{background:#f8fafc}.danger{background:var(--danger-soft);border-color:#ffd2cc;color:var(--danger)}form>button{width:100%;margin-top:16px}.hint,.small{color:var(--muted);font-size:.83rem}.hint{min-height:1.3em}.progress-row{display:flex;justify-content:space-between;color:var(--muted);font-size:.82rem;font-weight:700}.progress-row #timer{color:var(--ink);font-variant-numeric:tabular-nums}.progress{height:5px;background:#e9edf2;margin:8px 0 30px;overflow:hidden}.progress i{display:block;height:100%;background:var(--blue);width:0%;transition:width .3s}.prompt{margin-bottom:2px!important}.student-card #studentName{font-size:clamp(1.8rem,6vw,2.6rem);color:var(--ink);margin:0}.answer-actions{display:flex;gap:8px;margin-top:16px}.answer-actions button{margin:0;width:auto}.answer-actions .primary{flex:1}.admin-login{width:min(100%,430px);margin:42px auto}.admin{margin-top:8px}.admin-head,.results-title{display:flex;align-items:center;justify-content:space-between;gap:18px}.admin-head{margin-bottom:20px}.admin-head h2,.results-title h2{margin:0}.admin-grid{display:grid;grid-template-columns:1fr 1.25fr 1fr;gap:16px;margin:0 0 18px}.admin .card{padding:20px}.control-buttons{display:grid;gap:8px}.control-buttons button{width:100%}.status-line{display:inline-flex;background:var(--blue-soft);color:#1e40af;border:1px solid #dbeafe;padding:5px 8px;border-radius:4px;font-size:.83rem;font-weight:700;margin:0}.results{background:#fff;border:1px solid var(--line);border-radius:8px;padding:22px}.results-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(245px,1fr));gap:12px;margin-top:18px}.result-card{border:1px solid var(--line);border-radius:6px;padding:15px}.result-card h3{font-size:.95rem;margin:0 0 10px}.result-card ul{list-style:none;padding:0;margin:0;display:grid;gap:8px}.result-card li{border-left:2px solid #93c5fd;background:#f8fafc;padding:8px 9px;font-size:.88rem}.result-card .alias{font-size:.73rem;color:var(--muted);font-weight:700;margin-top:3px}.empty{color:var(--muted);font-size:.88rem;margin:0}#toast{position:fixed;right:20px;bottom:20px;max-width:360px;background:#1f2937;color:#fff;border-radius:5px;padding:11px 14px;opacity:0;transform:translateY(8px);pointer-events:none;transition:.2s}#toast.show{opacity:1;transform:none}@media(max-width:800px){.admin-grid{grid-template-columns:1fr 1fr}.session-control{grid-column:span 2}}@media(max-width:620px){.shell{width:min(100% - 28px,1120px);padding-top:26px}.hero,.admin-head,.results-title{align-items:flex-start;flex-direction:column}.hero{gap:14px}.student-card{margin-top:50px;padding:20px}.admin-grid{grid-template-columns:1fr}.session-control{grid-column:auto}.answer-actions{flex-direction:column}.answer-actions button{width:100%}.results{padding:18px}}
.countdown-number{display:block;font-size:6rem;line-height:1;font-variant-numeric:tabular-nums;color:var(--blue);margin:22px 0;font-weight:750}
.loading-spinner{display:block;width:32px;height:32px;margin:0 auto 16px;border:3px solid #dbeafe;border-top-color:var(--blue);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}
.result-actions{display:flex;gap:8px}.result-actions .ghost{padding:8px 10px}.results-list{display:grid;gap:10px;margin-top:18px}.result-list-item{border:1px solid var(--line);border-radius:6px;padding:15px 16px}.result-heading{display:flex;align-items:center;gap:10px;margin-bottom:10px}.result-heading h3{margin:0;font-size:1rem}.result-number{font-size:.75rem;font-weight:800;color:var(--blue);font-variant-numeric:tabular-nums}.result-count{margin-left:auto;color:var(--muted);font-size:.78rem}.result-list-item ol{margin:0;padding-left:25px;display:grid;gap:7px}.result-list-item li{padding-left:3px;font-size:.9rem}@media(max-width:620px){.result-actions{width:100%}.result-actions>*{flex:1}.result-heading{align-items:flex-start}.result-count{white-space:nowrap}}
.teacher-display{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;background:#172554;color:#fff;padding:28px 30px;margin:0 0 18px;border-radius:8px}.teacher-display .eyebrow{color:#bfdbfe}.teacher-display strong{display:block;font-size:clamp(2.5rem,7vw,5.5rem);line-height:1;letter-spacing:-.055em}.teacher-timer{margin:17px 0 0;color:#dbeafe;font-size:1.25rem;font-weight:700;font-variant-numeric:tabular-nums}.teacher-display .ghost{background:transparent;color:#fff;border-color:#5472ad;white-space:nowrap}@media(max-width:620px){.teacher-display{padding:22px;flex-direction:column}.teacher-display strong{font-size:2.4rem}}
.student-pdf{margin-left:4px;border:1px solid #bfdbfe;border-radius:4px;padding:4px 7px;color:#1e40af;background:var(--blue-soft);font-size:.72rem;font-weight:800;text-decoration:none}.student-pdf:hover{background:#dbeafe}
.select-all{display:flex;align-items:center;gap:6px;color:var(--muted);font-size:.8rem;font-weight:700;white-space:nowrap}.select-all input,.student-select{width:15px;height:15px;accent-color:var(--blue);cursor:pointer}.student-select{flex:0 0 auto}
#teacherDisplay:fullscreen,#teacherDisplay:-webkit-full-screen{width:100%;height:100%;margin:0;border:0;border-radius:0;display:flex;align-items:center;justify-content:center;text-align:center;position:relative;padding:64px;background:#172554}#teacherDisplay:fullscreen>div,#teacherDisplay:-webkit-full-screen>div{display:flex;min-height:70vh;flex-direction:column;align-items:center;justify-content:center}#teacherDisplay:fullscreen strong,#teacherDisplay:-webkit-full-screen strong{font-size:clamp(4rem,13vw,12rem);max-width:90vw}#teacherDisplay:fullscreen .eyebrow,#teacherDisplay:-webkit-full-screen .eyebrow{position:absolute;top:42px;left:0;right:0}#teacherDisplay:fullscreen .teacher-timer,#teacherDisplay:-webkit-full-screen .teacher-timer{position:absolute;bottom:40px;left:0;right:0;font-size:2rem}#teacherDisplay:fullscreen button,#teacherDisplay:-webkit-full-screen button{position:absolute;top:24px;right:24px}