:root{--bg: #0a0f0c;--surface: #121a15;--surface-2: #182420;--border: #22362b;--green: #39ff88;--green-dim: #1fae5c;--red: #ff5f6d;--text: #e6f5ec;--text-dim: #8fa89b;--font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);line-height:1.55}button{font-family:inherit;cursor:pointer}.app-shell{min-height:100vh;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;justify-content:space-between;padding:18px 28px;border-bottom:1px solid var(--border);background:var(--surface)}.brand{font-weight:700;color:var(--green);letter-spacing:-.01em}.topnav{display:flex;gap:10px}.topnav button{background:transparent;border:1px solid var(--border);color:var(--text-dim);padding:8px 16px;border-radius:8px;font-size:.88rem;transition:all .2s ease}.topnav button.active,.topnav button:hover{color:var(--green);border-color:var(--green-dim)}.content{flex:1;max-width:760px;width:100%;margin:0 auto;padding:40px 20px 70px}.status-text{text-align:center;color:var(--text-dim);margin-top:60px}.status-text.error{color:var(--red)}.quiz-card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:30px}.quiz-meta{display:flex;justify-content:space-between;font-size:.85rem;color:var(--text-dim);margin-bottom:14px}.timer{font-weight:700}.timer-warn{color:var(--red)}.progress-track{height:6px;background:var(--surface-2);border-radius:100px;overflow:hidden;margin-bottom:24px}.progress-fill{height:100%;background:var(--green);transition:width .3s ease}.category-tag{display:inline-block;font-size:.72rem;color:var(--green);background:#39ff8814;border:1px solid var(--border);padding:3px 10px;border-radius:100px;margin:0 0 14px}.question-text{font-size:1.25rem;margin:0 0 26px}.options-list{display:flex;flex-direction:column;gap:12px;margin-bottom:30px}.option-btn{display:flex;align-items:center;gap:12px;text-align:left;background:var(--surface-2);border:1px solid var(--border);color:var(--text);padding:14px 16px;border-radius:10px;font-size:.96rem;transition:all .15s ease}.option-btn:hover{border-color:var(--green-dim)}.option-btn.selected{border-color:var(--green);background:#39ff881a}.option-letter{width:26px;height:26px;flex:none;display:flex;align-items:center;justify-content:center;border-radius:50%;background:var(--surface);border:1px solid var(--border);font-size:.78rem;color:var(--text-dim)}.option-btn.selected .option-letter{color:var(--green);border-color:var(--green)}.quiz-nav{display:flex;align-items:center;justify-content:space-between;gap:12px}.quiz-nav button{background:var(--surface-2);border:1px solid var(--border);color:var(--text);padding:10px 18px;border-radius:8px;font-size:.9rem}.quiz-nav button:disabled{opacity:.4;cursor:not-allowed}.answered-count{font-size:.8rem;color:var(--text-dim)}.submit-btn{background:var(--green)!important;color:#05130b!important;border:none!important;font-weight:700}.report-card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:34px;text-align:center}.score-circle{width:150px;height:150px;border-radius:50%;margin:20px auto;display:flex;flex-direction:column;align-items:center;justify-content:center;border:4px solid var(--green)}.score-circle.fail{border-color:var(--red)}.score-percentage{font-size:2rem;font-weight:800}.score-fraction{font-size:.8rem;color:var(--text-dim)}.result-verdict{font-weight:700;letter-spacing:.04em;margin-bottom:30px}.result-verdict.pass{color:var(--green)}.result-verdict.fail{color:var(--red)}.breakdown-list{text-align:left;display:flex;flex-direction:column;gap:14px;margin-bottom:30px}.breakdown-item{border:1px solid var(--border);border-left:3px solid var(--green);background:var(--surface-2);border-radius:8px;padding:14px 16px}.breakdown-item.incorrect{border-left-color:var(--red)}.breakdown-question{margin:0 0 8px;font-weight:600}.breakdown-answer,.breakdown-correct{margin:2px 0;font-size:.88rem;color:var(--text-dim)}.breakdown-correct{color:var(--green)}.admin-layout{display:grid;grid-template-columns:1fr;gap:30px}.admin-form,.admin-list{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:26px}.admin-form label{display:block;font-size:.85rem;color:var(--text-dim);margin-bottom:14px}.admin-form input[type=text],.admin-form textarea{display:block;width:100%;margin-top:6px;background:var(--surface-2);border:1px solid var(--border);border-radius:8px;color:var(--text);padding:10px 12px;font-family:inherit;font-size:.92rem}.admin-form textarea{min-height:70px;resize:vertical}.option-input-row{display:flex;align-items:center;gap:10px}.option-input-row input[type=text]{flex:1;margin-top:0}.admin-form-actions{display:flex;gap:10px;margin-top:10px}.admin-form-actions button:not(.submit-btn){background:var(--surface-2);border:1px solid var(--border);color:var(--text);padding:10px 18px;border-radius:8px}.submit-btn{padding:10px 20px;border-radius:8px;font-size:.92rem}.admin-question-row{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:14px 0;border-bottom:1px solid var(--border)}.admin-question-row:last-child{border-bottom:none}.admin-question-text{margin:0 0 4px;font-size:.95rem}.admin-question-meta{margin:0;font-size:.78rem;color:var(--text-dim)}.admin-question-actions{display:flex;gap:8px;flex:none}.admin-question-actions button{background:var(--surface-2);border:1px solid var(--border);color:var(--text);padding:6px 12px;border-radius:6px;font-size:.82rem}.admin-question-actions button.danger{color:var(--red);border-color:var(--red)}@media (min-width: 860px){.content{max-width:900px}.admin-layout{grid-template-columns:380px 1fr}}