:root{--bg:#f6f7fb;--card-bg:#fff;--border:#e0e2ea;--text:#1c1f2b;--muted:#6b7080;--primary:#3457d5;--primary-hover:#2941ad;--danger:#c0392b;--correct:#1f8a4c;--incorrect:#c0392b}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--text);margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;overflow-x:hidden}.page{max-width:800px;margin:0 auto;padding:24px 16px 64px}.centered-page{justify-content:center;align-items:center;min-height:100vh;display:flex}.card{background:var(--card-bg);border:1px solid var(--border);border-radius:12px;margin-bottom:16px;padding:24px}.card h1,.card h2{margin-top:0}label{color:var(--muted);flex-direction:column;gap:4px;margin-bottom:12px;font-size:14px;font-weight:600;display:flex}input,textarea,select{border:1px solid var(--border);width:100%;color:var(--text);border-radius:8px;padding:10px 12px;font-family:inherit;font-size:16px}button{background:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:8px;padding:10px 16px;font-size:15px;font-weight:600}button:hover{background:var(--primary-hover)}button:disabled{opacity:.6;cursor:not-allowed}button.secondary{border:1px solid var(--border);color:var(--text);background:0 0}button.secondary:hover{background:var(--bg)}button.danger,button.secondary.danger{color:var(--danger)}button.link-button{color:var(--primary);background:0 0;padding:0;font-weight:500}.error{color:var(--danger);font-size:14px}.muted{color:var(--muted);font-size:13px}.app-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px 16px;margin-bottom:16px;display:flex}.app-header h1{font-size:22px}.app-header-actions{align-items:center;gap:16px;display:flex}.admin-nav{border-bottom:1px solid var(--border);-webkit-overflow-scrolling:touch;gap:4px;margin-bottom:24px;padding-bottom:8px;display:flex;overflow-x:auto}.admin-nav a{color:var(--muted);white-space:nowrap;border-radius:8px;flex-shrink:0;padding:6px 10px;font-weight:600;text-decoration:none}.admin-nav a.active{color:var(--primary);background:#eef1fb}.admin-section,.list{flex-direction:column;gap:8px;display:flex}.list-item{background:var(--card-bg);border:1px solid var(--border);border-radius:10px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px 12px;padding:14px 16px;display:flex}.list-item-link{color:inherit;text-decoration:none}.question-item{align-items:flex-start}.form-actions{gap:8px;display:flex}.badge{text-transform:capitalize;color:var(--primary);background:#eef1fb;border-radius:999px;padding:4px 10px;font-size:12px;font-weight:700}.badge.submitted{color:var(--correct);background:#e8f6ee}.badge.abandoned{color:var(--danger);background:#fbeaea}.question-picker{border:1px solid var(--border);border-radius:8px;max-height:260px;margin-bottom:16px;padding:12px;overflow-y:auto}.checkbox-row{color:var(--text);flex-direction:row;align-items:center;gap:8px;padding:4px 0;font-weight:400;display:flex}.exam-topbar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px 16px;margin-bottom:20px;display:flex}.timer{font-variant-numeric:tabular-nums;font-size:20px;font-weight:700}.question-card{padding:32px}.question-prompt{margin-bottom:24px;font-size:18px;line-height:1.5}.choices{flex-direction:column;gap:10px;display:flex}.choice-button{background:var(--card-bg);color:var(--text);border:1px solid var(--border);text-align:left;align-items:center;gap:12px;padding:14px 16px;display:flex}.choice-button:hover{border-color:var(--primary);background:#f5f7ff}.choice-key{background:var(--bg);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;font-weight:700;display:inline-flex}.score-card{text-align:center;padding:40px}.score-big{color:var(--primary);font-size:48px;font-weight:800}.button-link{margin-top:16px;text-decoration:none;display:inline-block}.review-list{flex-direction:column;gap:16px;display:flex}.review-card{border-left:4px solid var(--border)}.review-card.correct{border-left-color:var(--correct)}.review-card.incorrect{border-left-color:var(--incorrect)}.review-choice{border:1px solid var(--border);border-radius:8px;flex-wrap:wrap;align-items:center;gap:6px 10px;margin-bottom:8px;padding:10px 12px;display:flex}.review-choice.is-correct-choice{border-color:var(--correct);background:#e8f6ee}.review-choice.is-wrong-choice{border-color:var(--incorrect);background:#fbeaea}.tag{text-transform:uppercase;color:var(--muted);margin-left:auto;font-size:11px;font-weight:700}@media (width<=600px){.page{padding:16px 12px 48px}.card{padding:16px}.question-card{padding:20px}.score-card{padding:24px}.score-big{font-size:36px}.app-header h1{font-size:19px}.form-actions{flex-wrap:wrap}.card>form>button[type=submit],.card button[type=submit]{width:100%}.choice-button{padding:12px 14px}}