*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--bg:#0f1117;--bg2:#181c27;--bg3:#1e2333;--border:#2a3050;--accent:#ff8700;--accent2:#ffa940;--text:#c9d1e0;--text-h:#eaf0ff;--green:#22c55e;--green-bg:#22c55e1f;--red:#ef4444;--red-bg:#ef44441f;--blue:#3b82f6;--blue-bg:#3b82f61f;--shadow:0 8px 32px #00000080;--radius:14px;font-family:Segoe UI,system-ui,sans-serif}html{height:100%}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;min-height:100vh;margin:0}.app-shell{flex-direction:column;min-height:100vh;display:flex}.app-header{z-index:50;background:var(--bg2);border-bottom:1px solid var(--border);max-width:100%;position:sticky;top:0}.app-header-inner{align-items:center;gap:16px;width:100%;max-width:1200px;min-height:56px;margin:0 auto;padding:10px 20px;display:flex}.app-logo-link{color:inherit;border-radius:10px;flex-shrink:0;align-items:center;gap:10px;margin:-2px -4px -2px -2px;padding:2px 4px 2px 2px;text-decoration:none;transition:opacity .15s;display:inline-flex}.app-logo-link:hover{opacity:.92}.app-logo-link:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.app-logo-mark{background:linear-gradient(135deg, var(--accent), var(--accent2));color:#fff;letter-spacing:.1em;border-radius:8px;padding:6px 12px;font-size:.95rem;font-weight:800;line-height:1;display:inline-block}.app-logo-wordmark{color:var(--text-h);letter-spacing:.02em;font-size:1.15rem;font-weight:700}.app-header-spacer{flex:1;min-width:8px}.app-header-user-wrap{flex-shrink:0;position:relative}.app-user-trigger{cursor:pointer;background:0 0;border:none;border-radius:999px;justify-content:center;align-items:center;padding:0;transition:box-shadow .15s;display:flex;box-shadow:0 0 0 2px #ff870033}.app-user-trigger:hover{box-shadow:0 0 0 2px #ff870073}.app-user-trigger:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.app-user-avatar{object-fit:cover;border-radius:999px;justify-content:center;align-items:center;width:36px;height:36px;display:flex}.app-user-avatar-img{display:block}.app-user-avatar-fallback{background:linear-gradient(135deg, var(--accent), var(--accent2));color:#fff;font-size:.75rem;font-weight:800}.app-user-dropdown{background:var(--bg2);border:1px solid var(--border);width:min(280px,100vw - 32px);box-shadow:var(--shadow);z-index:100;border-radius:12px;padding:8px 0;position:absolute;top:calc(100% + 10px);right:0}.app-user-dropdown-head{align-items:center;gap:12px;padding:12px 16px;display:flex}.app-user-dropdown-avatar{object-fit:cover;border-radius:999px;flex-shrink:0;width:40px;height:40px}.app-user-dropdown-meta{text-align:left;flex-direction:column;gap:2px;min-width:0;display:flex}.app-user-dropdown-name{color:var(--text-h);text-overflow:ellipsis;white-space:nowrap;font-size:.9rem;font-weight:600;overflow:hidden}.app-user-dropdown-email{color:var(--text);opacity:.85;text-overflow:ellipsis;white-space:nowrap;font-size:.75rem;overflow:hidden}.app-user-dropdown-sep{border:none;border-top:1px solid var(--border);margin:6px 0}.app-user-dropdown-item{width:100%;color:var(--text);text-align:left;cursor:pointer;background:0 0;border:none;align-items:center;gap:10px;padding:10px 16px;font-size:.875rem;font-weight:500;transition:background 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48px;display:flex}.card{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius);width:100%;max-width:720px;box-shadow:var(--shadow);padding:32px}.btn{cursor:pointer;border:none;border-radius:10px;padding:12px 28px;font-size:1rem;font-weight:600;transition:opacity .15s,transform .1s}.btn:active{transform:scale(.97)}.btn:disabled{opacity:.35;cursor:not-allowed;transform:none}.btn-primary{background:linear-gradient(135deg, var(--accent), var(--accent2));color:#fff}.btn-primary:not(:disabled):hover{opacity:.88}.btn-large{border-radius:12px;padding:14px 40px;font-size:1.1rem}.btn-google{color:#1f1f1f;letter-spacing:.015em;cursor:pointer;background:#fff;border:1px solid #747775;border-radius:4px;justify-content:center;align-items:center;gap:12px;width:100%;min-height:40px;padding:10px 24px;font-size:14px;font-weight:500;line-height:1.25;transition:background .15s,box-shadow .15s,border-color .15s;display:inline-flex;box-shadow:0 1px 2px #00000014}.btn-google:hover{background:#f8f9fa;box-shadow:0 1px 3px #0000001f}.btn-google:focus-visible{outline-offset:2px;outline:2px solid #4285f4}.btn-google:active{background:#f1f3f4}.btn-google:disabled{opacity:.5;cursor:not-allowed}.btn-google-icon{flex-shrink:0;display:block}.btn-google-large{min-height:44px;padding:12px 28px;font-size:15px}.start-screen{justify-content:center}.start-card{text-align:center;max-width:540px}.start-card-wide{max-width:640px}.streak-chart{background:var(--bg3);border:1px solid var(--border);text-align:left;border-radius:12px;margin:20px 0 8px;padding:16px 18px}.streak-chart-title{color:var(--text-h);margin-bottom:6px;font-size:.95rem;font-weight:700}.streak-chart-hint{color:var(--text);opacity:.9;margin-bottom:14px;font-size:.78rem;line-height:1.45}.streak-chart-hint strong{color:var(--text-h)}.streak-chart-list{flex-direction:column;gap:10px;margin:0;padding:0;list-style:none;display:flex}.streak-chart-row{grid-template-columns:minmax(5.5rem,7rem) 1fr 2rem;align-items:center;gap:10px;display:grid}@media (max-width:480px){.streak-chart-row{grid-template-columns:minmax(4.5rem,5.5rem) 1fr 1.75rem;gap:6px}}.streak-chart-label{color:var(--text);text-align:right;font-size:.78rem;font-weight:600;line-height:1.2}.streak-chart-track{background:var(--border);border-radius:6px;height:12px;overflow:hidden}.streak-chart-fill{border-radius:6px;min-width:0;height:100%;transition:width .35s}.streak-chart-fill--3{background:linear-gradient(90deg, #15803d, var(--green))}.streak-chart-fill--2{background:linear-gradient(90deg, #2563eb, var(--blue))}.streak-chart-fill--1{background:linear-gradient(90deg,#ca8a04,#eab308)}.streak-chart-fill--0{background:linear-gradient(90deg,#4b5563,#6b7280)}.streak-chart-count{font-variant-numeric:tabular-nums;color:var(--text-h);text-align:right;font-size:.85rem;font-weight:700}.logo-badge{background:linear-gradient(135deg, var(--accent), var(--accent2));color:#fff;letter-spacing:.12em;border-radius:10px;margin-bottom:20px;padding:10px 22px;font-size:1.5rem;font-weight:800;display:inline-block}.start-card h1{color:var(--text-h);margin-bottom:6px;font-size:1.6rem;line-height:1.25}.subtitle{color:var(--accent);letter-spacing:.03em;margin-bottom:28px;font-size:1rem;font-weight:600}.stats-row{justify-content:center;gap:32px;margin-bottom:24px;display:flex}.stat{flex-direction:column;align-items:center;display:flex}.stat-number{color:var(--text-h);font-size:2rem;font-weight:700;line-height:1}.stat-label{color:var(--text);text-transform:uppercase;letter-spacing:.06em;margin-top:4px;font-size:.8rem}.info{color:var(--text);background:var(--bg3);border:1px solid var(--border);text-align:left;border-radius:10px;margin-bottom:28px;padding:14px 18px;font-size:.9rem;line-height:1.55}.info 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12px;font-size:.78rem;font-weight:700;display:inline-block}.question-text{color:var(--text-h);font-size:1.1rem;font-weight:600;line-height:1.5}.options{flex-direction:column;gap:10px;display:flex}.option{background:var(--bg3);border:2px solid var(--border);cursor:pointer;text-align:left;width:100%;color:var(--text);border-radius:10px;align-items:flex-start;gap:12px;padding:13px 16px;font-size:.95rem;line-height:1.45;transition:border-color .15s,background .15s;display:flex}.option:hover:not(:disabled){border-color:var(--accent);background:#ff87000f}.option.selected{border-color:var(--accent);color:var(--text-h);background:#ff87001a}.option.correct{border-color:var(--green);background:var(--green-bg);color:var(--text-h);cursor:default}.option.wrong{border-color:var(--red);background:var(--red-bg);color:var(--text-h);cursor:default}.option-letter{background:var(--border);width:26px;height:26px;color:var(--text-h);border-radius:6px;flex-shrink:0;justify-content:center;align-items:center;font-size:.78rem;font-weight:700;display:flex}.option.selected .option-letter{background:var(--accent);color:#fff}.option.correct .option-letter{background:var(--green);color:#fff}.option.wrong .option-letter{background:var(--red);color:#fff}.option-text{flex:1}.option-icon{flex-shrink:0;margin-left:4px;font-size:1rem;font-weight:700}.option-icon.ci{color:var(--green)}.option-icon.wi{color:var(--red)}.selection-hint{color:var(--text);text-align:center;font-size:.82rem}.feedback{border:1px solid;border-radius:10px;padding:14px 18px}.feedback-correct{background:var(--green-bg);border-color:#22c55e59}.feedback-wrong{background:var(--red-bg);border-color:#ef444459}.feedback-header{margin-bottom:6px;font-size:1rem;font-weight:700}.feedback-correct .feedback-header{color:var(--green)}.feedback-wrong .feedback-header{color:var(--red)}.feedback-text{color:var(--text);font-size:.88rem;line-height:1.55}.btn-row{justify-content:flex-end;display:flex}.result-screen{justify-content:center}.result-card{text-align:center;flex-direction:column;align-items:center;gap:24px;max-width:480px;display:flex}.result-verdict{border-radius:12px;padding:10px 28px;font-size:1.8rem;font-weight:800}.verdict-pass{background:var(--green-bg);color:var(--green);border:2px solid #22c55e59}.verdict-fail{background:var(--red-bg);color:var(--red);border:2px solid #ef444459}.result-score{flex-direction:column;align-items:center;display:flex}.score-number{color:var(--text-h);font-size:4rem;font-weight:800;line-height:1}.score-label{color:var(--text);text-transform:uppercase;letter-spacing:.07em;margin-top:4px;font-size:.85rem}.result-stats{gap:24px;display:flex}.result-stat{border:1px solid var(--border);border-radius:10px;flex-direction:column;align-items:center;min-width:80px;padding:14px 20px;display:flex}.rs-correct{background:var(--green-bg);border-color:#22c55e40}.rs-error{background:var(--red-bg);border-color:#ef444440}.rs-total{background:var(--bg3)}.rs-number{color:var(--text-h);font-size:2rem;font-weight:700;line-height:1}.rs-correct .rs-number{color:var(--green)}.rs-error .rs-number{color:var(--red)}.rs-label{text-transform:uppercase;letter-spacing:.06em;color:var(--text);margin-top:4px;font-size:.78rem}.result-message{color:var(--text);font-size:.95rem;line-height:1.6}.result-message strong{color:var(--text-h)}.exam-hint{color:var(--text);opacity:.7;margin-top:6px;font-size:.8rem}@media (max-width:600px){.card{padding:20px 16px}.start-card h1{font-size:1.3rem}.stats-row{gap:18px}.question-text{font-size:1rem}.score-number{font-size:3rem}.result-stats{gap:12px}.result-stat{min-width:66px;padding:10px 14px}}