*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;background:#0d1117;color:#c9d1d9;min-height:100vh;padding:20px}.container{max-width:860px;margin:0 auto}.screen{display:none}.screen.active{display:block}h1,h2{color:#58a6ff}.subtitle,.muted{color:#8b949e}.config-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:20px 0}.config-group label{display:block;color:#8b949e;font-size:.85rem;margin-bottom:4px}.config-group select,.config-group input{width:100%;background:#161b22;color:#c9d1d9;border:1px solid #30363d;padding:10px 12px;border-radius:8px;font-size:1rem}.mode-cards{display:flex;gap:12px;flex-wrap:wrap;margin:18px 0}.mode-card{flex:1;min-width:170px;text-align:left;background:#161b22;color:#c9d1d9;border:2px solid #30363d;border-radius:10px;padding:14px;cursor:pointer}.mode-card span{display:block;color:#8b949e;font-size:.85rem;margin-top:4px}.mode-card.selected{border-color:#58a6ff;background:#1a2332}.primary{background:#238636;color:#fff;border:0;padding:12px 26px;border-radius:8px;font-weight:700;cursor:pointer}.secondary{background:#30363d;color:#fff;border:0;padding:10px 18px;border-radius:8px;cursor:pointer}.sm{padding:6px 12px;font-size:.85rem}.callout{border-left:3px solid #58a6ff;background:#161b22;padding:12px 16px;border-radius:0 8px 8px 0;margin-bottom:18px;color:#8b949e}.progress-bar{height:8px;background:#161b22;border-radius:8px;overflow:hidden;margin-bottom:14px}.progress-fill{height:100%;background:#58a6ff}.quiz-topbar{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:14px;flex-wrap:wrap}.question-num{color:#58a6ff;font-weight:700}.question-topic{background:#1f2937;color:#8b949e;padding:4px 10px;border-radius:999px;font-size:.85rem}.timer-display{font-family:ui-monospace,Consolas,monospace;background:#161b22;border:1px solid #30363d;padding:6px 12px;border-radius:8px}.timer-display.warning{color:#d29922;border-color:#d29922}.timer-display.critical{color:#f85149;border-color:#f85149}.scenario{white-space:pre-wrap;background:#161b22;border-left:3px solid #58a6ff;padding:14px 18px;border-radius:0 8px 8px 0;line-height:1.55}.question-text{font-size:1.08rem;color:#c9d1d9}.select-hint{color:#8b949e;font-style:italic;margin-bottom:12px}.options{display:flex;flex-direction:column;gap:10px}.option{display:flex;gap:12px;align-items:flex-start;background:#161b22;border:2px solid #30363d;border-radius:10px;padding:14px 16px;cursor:pointer;line-height:1.45}.option:hover:not(.disabled),.option.selected{border-color:#58a6ff;background:#1a2332}.option.correct{border-color:#3fb950;background:#0d2818}.option.incorrect{border-color:#f85149;background:#2d1214}.option.missed{border-color:#d29922;background:#2a2000}.option.disabled{cursor:default;opacity:.9}.option-letter{background:#30363d;color:#8b949e;width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;flex-shrink:0}.option.selected .option-letter{background:#58a6ff;color:white}.feedback{border-radius:10px;padding:16px 20px;margin:18px 0;line-height:1.55}.feedback.correct-fb{background:#0d2818;border:1px solid #3fb950}.feedback.incorrect-fb{background:#2d1214;border:1px solid #f85149}.feedback.partial-fb{background:#2a2000;border:1px solid #d29922}.btn-row{display:flex;gap:12px;justify-content:flex-end;align-items:center;flex-wrap:wrap;margin-top:18px}.center{justify-content:center}.score-circle{width:140px;height:140px;border-radius:50%;margin:20px auto;display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:2rem;font-weight:800}.score-circle.pass{background:#0d2818;border:4px solid #3fb950;color:#3fb950}.score-circle.fail{background:#2d1214;border:4px solid #f85149;color:#f85149}.score-circle span{font-size:.75rem;color:#8b949e}.results-header{text-align:center}.results-summary{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin:18px 0}.stat-card{background:#161b22;border:1px solid #30363d;border-radius:10px;padding:14px 18px;text-align:center;min-width:110px}.stat-card .val{font-size:1.3rem;font-weight:800;color:#58a6ff}.stat-card .lbl{font-size:.82rem;color:#8b949e}.cat-row{display:flex;align-items:center;gap:10px;margin-bottom:8px}.cat-label{width:180px;color:#8b949e}.cat-bar-bg{flex:1;background:#30363d;border-radius:6px;height:18px;overflow:hidden}.cat-bar-fill{height:100%;background:#58a6ff}.cat-pct{width:48px;text-align:right}.review-item{background:#161b22;border:1px solid #30363d;border-radius:10px;padding:14px 18px;margin-bottom:12px}.review-item.ri-correct{border-left:4px solid #3fb950}.review-item.ri-incorrect{border-left:4px solid #f85149}.review-item.ri-partial{border-left:4px solid #d29922}.review-detail{color:#8b949e;line-height:1.45}.time-expired-banner{background:#2d1214;border:1px solid #f85149;border-radius:10px;padding:14px;margin-bottom:18px}code{background:#1f2937;padding:2px 6px;border-radius:4px;font-family:ui-monospace,Consolas,monospace}
.version-line{color:#8b949e;margin-top:-8px;margin-bottom:12px;font-size:.9rem}.start-actions{justify-content:flex-start}.app-footer{max-width:860px;margin:28px auto 0;padding:18px 0 4px;border-top:1px solid #30363d;color:#8b949e;text-align:center;font-size:.9rem;line-height:1.7}.app-footer strong{color:#c9d1d9}.app-footer a,.about-body a{color:#58a6ff;text-decoration:none}.app-footer a:hover,.about-body a:hover{text-decoration:underline}.about-dialog{background:#0d1117;color:#c9d1d9;border:1px solid #30363d;border-radius:12px;max-width:540px;width:calc(100% - 32px);padding:0}.about-dialog::backdrop{background:rgba(0,0,0,.65)}.about-content{padding:20px}.about-header{display:flex;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid #30363d;margin-bottom:14px}.about-header h2{margin:0 0 12px}.about-body{line-height:1.55;color:#c9d1d9}.about-body p{margin:0 0 12px}
@media(max-width:650px){.config-grid{grid-template-columns:1fr}.mode-cards{flex-direction:column}.cat-label{width:120px}}