:root{--primary: #2562b5;--primary-dark: #1c4d8f;--bg: #eff8ff;--surface: #ffffff;--surface-alt: #f1f7ff;--border: #d6e6f7;--text: #25425a;--muted: #60717b;--success: #1f8f5b;--success-bg: #e6fbf4;--danger: #c02020;--danger-bg: #fff0f3;--warning: #c98410}*{box-sizing:border-box}body{margin:0;color:var(--text);background:var(--bg);font-size:15px;line-height:1.45;overscroll-behavior-y:none}button{font:inherit;color:inherit;cursor:pointer}.app{display:flex;flex-direction:column;min-height:100vh;max-width:720px;margin:0 auto;background:var(--bg)}.topbar{display:flex;align-items:center;background:var(--primary);color:#fff;padding:14px;gap:10px;box-shadow:0 2px 8px #2150962e;position:sticky;top:0;z-index:5}.topbar .back{background:#ffffff26;border:0;color:#fff;padding:6px 10px;border-radius:8px;font-weight:700}.topbar h1{margin:0;font-size:17px;font-weight:800;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.topbar .logo{width:32px;height:32px;border-radius:8px;object-fit:cover;background:#ffffff2e}.topbar .timer{background:#ffffff38;padding:5px 10px;border-radius:14px;font-weight:800;font-variant-numeric:tabular-nums}.topbar .submit-btn{background:#ffffff38;border:0;color:#fff;padding:6px 12px;border-radius:8px;font-weight:800}.content{flex:1;padding:14px;overflow-y:auto}.card{background:var(--surface);border-radius:16px;border:1px solid var(--border);padding:16px;margin-bottom:12px;box-shadow:0 4px 14px #7d9bc51f}.btn{display:inline-flex;align-items:center;justify-content:center;background:var(--primary);color:#fff;border:0;padding:12px 18px;border-radius:14px;font-weight:800;font-size:15px;width:100%}.btn.secondary{background:#fff;color:var(--primary);border:1px solid var(--primary)}.btn:disabled{opacity:.5}.home-hero{display:flex;flex-direction:column;align-items:center;text-align:center;padding:18px 14px 12px;background:linear-gradient(160deg,var(--primary) 0%,var(--primary-dark) 100%);color:#fff;border-radius:0 0 24px 24px;margin:-14px -14px 16px}.home-hero .logo-big{width:84px;height:84px;border-radius:22px;margin-bottom:12px;background:#fff;padding:4px;box-shadow:0 8px 22px #0000002e;object-fit:cover}.home-hero h2{margin:0;font-size:19px;font-weight:900;letter-spacing:.2px}.home-hero .sub{margin-top:4px;color:#ffffffd9;font-size:13px;font-weight:600}.qr-card{display:flex;align-items:center;gap:14px}.qr-card .qr-img{width:96px;height:96px;background:#fff;padding:6px;border-radius:12px;border:1px solid var(--border);flex:0 0 auto}.qr-card .qr-meta{flex:1;min-width:0}.qr-card .qr-title{font-weight:800;font-size:14px;margin-bottom:4px}.qr-card .qr-sub{color:var(--muted);font-size:12px;font-weight:600;line-height:1.5}.qr-card .qr-link{margin-top:8px;display:inline-block;padding:8px 12px;background:var(--primary);color:#fff;border-radius:10px;text-decoration:none;font-weight:800;font-size:13px}.android-modal{background:var(--surface);border-radius:22px;padding:22px 18px 16px;margin-bottom:12px;text-align:center;box-shadow:0 18px 40px #0000002e;width:100%;max-width:360px;position:relative}.android-modal .icon{width:64px;height:64px;border-radius:18px;margin:0 auto 10px;background:#fff;padding:4px;box-shadow:0 6px 18px #0000001f;object-fit:cover}.android-modal h3{margin:0 0 4px;font-size:17px;font-weight:900}.android-modal p{margin:0 0 14px;color:var(--muted);font-size:13px;font-weight:600}.android-modal .actions{display:flex;flex-direction:column;gap:8px}.android-modal .close{position:absolute;top:8px;right:12px;background:transparent;border:0;font-size:22px;color:var(--muted);padding:6px 10px}.home-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:12px}.home-tile{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:16px 12px 14px;text-align:center;box-shadow:0 4px 14px #7d9bc51a;display:flex;flex-direction:column;align-items:center;gap:8px}.home-tile h3{margin:0;font-size:15px;font-weight:800}.home-tile p{margin:0;color:var(--muted);font-size:12px;font-weight:600;line-height:1.4}.home-tile .tile-icon{width:52px;height:52px;border-radius:16px;display:flex;align-items:center;justify-content:center;color:#fff}.home-tile .tile-icon svg{width:28px;height:28px}.exam-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.exam-tile{background:var(--surface);border-radius:18px;border:1px solid var(--border);padding:18px 8px;text-align:center;box-shadow:0 4px 14px #7d9bc51f;cursor:pointer;position:relative}.exam-tile.pass{background:#e6fbf4;border-color:#b8eedb}.exam-tile .num{font-size:28px;font-weight:900;color:var(--primary)}.exam-tile .lbl{color:var(--muted);font-size:12px;font-weight:700}.exam-tile .status{display:flex;justify-content:center;gap:8px;margin-top:6px;font-size:12px;font-weight:800}.exam-tile .ok{color:#1f8f5b}.exam-tile .bad{color:#c02020}.level-select{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;padding:6px 0 12px}.level-pill{background:var(--surface);border:1px solid var(--border);padding:9px 0;border-radius:12px;font-weight:800;color:var(--text);white-space:nowrap;text-align:center;font-size:14px}.level-pill.active{background:var(--primary);color:#fff;border-color:var(--primary)}@media (max-width: 360px){.level-select{grid-template-columns:repeat(4,1fr)}}.topic-card{background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:14px;margin-bottom:10px;box-shadow:0 4px 12px #7d9bc51f;cursor:pointer}.topic-card .row{display:flex;align-items:center;gap:12px}.topic-card .icon{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:900}.topic-card .chapter{font-weight:900;font-size:13px}.topic-card .count{color:var(--muted);font-size:12px;font-weight:700}.topic-card .title{margin-top:10px;font-weight:800;font-size:14px;color:var(--text)}.question{background:var(--surface);padding:14px;border-radius:16px;border:1px solid var(--border);font-weight:800;line-height:1.55;font-size:16px;margin-bottom:10px}.question.critical{background:var(--danger-bg);color:#8a2430}.question-image{width:100%;border-radius:16px;background:var(--surface);border:1px solid var(--border);margin-bottom:10px;aspect-ratio:16 / 10;display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:13px;font-weight:700}.answers{display:flex;flex-direction:column;gap:8px;margin-bottom:12px}.answer{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:12px 14px;text-align:left;color:var(--text);font-weight:600;font-size:14px;line-height:1.5;display:flex;gap:10px}.answer .letter{flex:0 0 26px;height:26px;border-radius:50%;background:var(--surface-alt);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-weight:800;color:var(--primary)}.answer.selected{border-color:var(--primary)}.answer.selected .letter{background:var(--primary);color:#fff;border-color:var(--primary)}.answer.correct{background:var(--success-bg);border-color:var(--success);color:#155c3a}.answer.correct .letter{background:var(--success);color:#fff;border-color:var(--success)}.answer.wrong{background:var(--danger-bg);border-color:var(--danger);color:#7a1d1d}.answer.wrong .letter{background:var(--danger);color:#fff;border-color:var(--danger)}.hint{padding:12px;border-radius:14px;border:1px solid var(--border);border-left:4px solid var(--success);background:var(--surface);margin-bottom:12px}.hint .lbl{font-size:11px;font-weight:900;letter-spacing:.6px;color:var(--success);margin-bottom:6px}.hint .src{color:var(--muted);font-size:11px;font-weight:700;margin-top:6px}.bottombar{display:flex;background:var(--surface);border-top:1px solid var(--border);padding:10px 14px;gap:10px;position:sticky;bottom:0}.bottombar button{flex:1;background:var(--surface-alt);border:1px solid var(--border);border-radius:12px;padding:10px;font-weight:800;color:var(--text)}.bottombar button.primary{background:var(--primary);color:#fff;border-color:var(--primary)}.bottombar button:disabled{opacity:.5}.qmap{display:grid;grid-template-columns:repeat(6,1fr);gap:6px}.qmap .cell{aspect-ratio:1;border-radius:8px;background:var(--surface-alt);border:1px solid var(--border);font-weight:800;color:var(--text);display:flex;align-items:center;justify-content:center;font-size:13px}.qmap .cell.active{background:var(--primary);color:#fff;border-color:var(--primary)}.qmap .cell.ok{background:var(--success-bg);border-color:var(--success);color:#155c3a}.qmap .cell.bad{background:var(--danger-bg);border-color:var(--danger);color:#7a1d1d}.qmap .cell.crit{box-shadow:0 0 0 2px #c02020 inset}.loading{padding:40px 16px;text-align:center;color:var(--muted)}.error{padding:24px;text-align:center;color:var(--danger);font-weight:800}.modal-back{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000073;display:flex;align-items:flex-end;justify-content:center;z-index:50}.modal{background:var(--bg);width:100%;border-top-left-radius:24px;border-top-right-radius:24px;padding:16px;max-height:70vh;overflow-y:auto;max-width:720px}.result-summary{background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:20px;text-align:center;margin-bottom:14px}.result-summary.pass{background:var(--success-bg);border-color:var(--success)}.result-summary.fail{background:var(--danger-bg);border-color:var(--danger)}.result-summary .big{font-size:28px;font-weight:900}.result-summary .label{color:var(--muted);font-weight:700}@media (min-width: 720px){.app{box-shadow:0 0 22px #00000014}}