:root{color-scheme:dark;--bg: #0b0f19;--panel: #161e2e;--panel-soft: #222e45;--ink: #f3f4f6;--muted: #9ca3af;--line: #2d3748;--primary: #4f46e5;--primary-dark: #818cf8;--primary-soft: #1e1b4b;--amber: #f59e0b;--amber-soft: #352512;--coral: #ef4444;--coral-soft: #381a18;--cyan: #06b6d4;--shadow: 0 12px 40px rgba(0, 0, 0, .6)}*{box-sizing:border-box}html{min-height:100%;background:var(--bg)}body{min-height:100%;margin:0;background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;letter-spacing:0}button,input{font:inherit;letter-spacing:0}button{border:0}button:not(:disabled){cursor:pointer}button:disabled{cursor:not-allowed}button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid rgba(79,70,229,.3);outline-offset:3px}.app-shell{width:min(100% - 20px,1180px);min-height:100vh;margin:0 auto;padding:14px 0 44px}.topbar{display:flex;flex-direction:column;align-items:flex-start;gap:16px;margin-bottom:22px}.brand{display:flex;align-items:center;gap:14px;min-width:0}.brand-mark{display:grid;width:54px;height:54px;flex:0 0 auto;place-items:center;border-radius:8px;background:var(--primary);color:#fff;box-shadow:0 10px 22px #4f46e53d}.eyebrow{margin:0 0 4px;color:var(--primary-dark);font-size:.82rem;font-weight:800;text-transform:uppercase}h1,h2{margin:0;color:var(--ink);line-height:1.15}h1{font-size:1.45rem}h2{font-size:1.18rem}.top-stats{display:flex;flex-wrap:wrap;justify-content:flex-start;gap:8px}.top-stats span,.tag-badge{display:inline-flex;align-items:center;min-height:30px;border:1px solid var(--line);border-radius:999px;background:var(--panel-soft);color:var(--muted);font-size:.9rem;font-weight:700;padding:5px 11px;white-space:nowrap}.setup-layout,.quiz-layout{display:grid;grid-template-columns:1fr;gap:18px;align-items:start}.topic-panel,.test-panel,.quiz-panel,.score-panel,.result-summary,.review-section{border:1px solid var(--line);border-radius:8px;background:var(--panel);box-shadow:var(--shadow);padding:16px}.test-panel,.score-panel{position:static}.section-heading{display:flex;align-items:center;gap:9px;margin-bottom:16px;color:var(--primary-dark)}.topic-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}.topic-tile{display:flex;min-height:52px;align-items:center;justify-content:space-between;gap:8px;border:1px solid var(--line);border-radius:8px;background:var(--panel-soft);color:var(--ink);padding:8px 10px;text-align:left;transition:transform .16s ease,border-color .16s ease,background .16s ease,box-shadow .16s ease}.topic-tile:hover{border-color:#4f46e56b;transform:translateY(-1px)}.topic-tile.is-selected{border-color:var(--primary);background:var(--primary-soft);box-shadow:inset 0 0 0 1px #4f46e547}.topic-tile span{display:block;align-self:center;min-width:0;overflow-wrap:anywhere;font-size:.9rem;font-weight:750;line-height:1.25}.topic-tile strong{display:grid;width:32px;height:32px;flex:0 0 auto;place-items:center;border-radius:999px;background:var(--panel);color:var(--primary-dark);font-size:.8rem;font-weight:750}.all-topic{border-color:#4f46e533}.filter-mode-panel{margin-top:22px;padding-top:18px;border-top:1px solid var(--line)}.segmented-control{display:grid;grid-template-columns:1fr;gap:8px;margin-top:8px}.segment-button{display:flex;flex-direction:column;align-items:flex-start;justify-content:center;gap:2px;padding:10px 14px;border:1px solid var(--line);border-radius:8px;background:var(--panel-soft);color:var(--ink);text-align:left;transition:border-color .16s ease,background .16s ease,box-shadow .16s ease}.segment-button:hover{border-color:#4f46e56b}.segment-button.is-active{border-color:var(--primary);background:var(--primary-soft);box-shadow:inset 0 0 0 1px #4f46e547}.segment-button strong{font-size:.95rem;font-weight:750;color:var(--ink)}.segment-button.is-active strong{color:var(--primary-dark)}.segment-desc{font-size:.8rem;color:var(--muted)}.selected-topic{display:grid;gap:4px;border-radius:8px;background:var(--panel-soft);padding:14px;margin-bottom:18px}.selected-topic span,.field-label,.test-summary dt{color:var(--muted);font-size:.88rem;font-weight:750}.selected-topic strong{overflow-wrap:anywhere;font-size:1.22rem}.field-label{display:block;margin-bottom:9px}.count-control{display:grid;grid-template-columns:1fr;gap:10px;align-items:center}input[type=range]{width:100%;accent-color:var(--primary)}.count-input{width:100%;min-height:42px;border:1px solid var(--line);border-radius:8px;background:var(--panel-soft);color:var(--ink);padding:8px 10px}.quick-counts{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 18px}.chip-button{min-width:46px;min-height:36px;border:1px solid var(--line);border-radius:999px;background:var(--panel-soft);color:var(--muted);font-weight:800}.chip-button.is-active{border-color:var(--primary);background:var(--primary);color:#fff}.test-summary{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:0 0 18px}.test-summary div,.score-row{display:grid;gap:4px;border:1px solid var(--line);border-radius:8px;background:var(--panel-soft);padding:12px}.test-summary dd{margin:0;font-size:1.45rem;font-weight:850}.primary-action,.ghost-button{display:inline-flex;min-height:46px;align-items:center;justify-content:center;gap:8px;border-radius:8px;padding:10px 15px;font-weight:850;transition:transform .16s ease,box-shadow .16s ease,background .16s ease}.primary-action{width:100%;background:var(--primary);color:#fff;box-shadow:0 10px 20px #4f46e538}.primary-action:not(:disabled):hover{background:var(--primary-dark);color:var(--bg);transform:translateY(-1px)}.primary-action:disabled{opacity:.55}.ghost-button{border:1px solid var(--line);background:var(--panel);color:var(--ink)}.ghost-button:not(:disabled):hover{background:var(--panel-soft)}.quiz-meta{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px;color:var(--muted);font-weight:800}.progress-track{height:9px;overflow:hidden;border-radius:999px;background:var(--panel-soft);margin-bottom:16px}.progress-track span{display:block;height:100%;border-radius:inherit;background:var(--primary);transition:width .22s ease}.question-tags{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:14px}.question-card{border:1px solid var(--line);border-radius:8px;background:var(--panel-soft);padding:18px}.question-line{margin:0 0 12px;color:var(--ink);font-size:1.08rem;line-height:1.68}.question-line:last-child{margin-bottom:0}.question-prompt{color:var(--primary-dark);font-weight:850}.options-list{display:grid;gap:10px;margin-top:16px}.option-button{display:grid;grid-template-columns:38px minmax(0,1fr);min-height:52px;align-items:center;gap:12px;border:1px solid var(--line);border-radius:8px;background:var(--panel);color:var(--ink);padding:10px 13px;text-align:left;transition:transform .14s ease,border-color .14s ease,background .14s ease}.option-button:not(:disabled):hover{border-color:#4f46e570;transform:translateY(-1px)}.option-button span:last-child{min-width:0;overflow-wrap:anywhere;line-height:1.45}.option-letter{display:grid;width:36px;height:36px;place-items:center;border-radius:999px;background:var(--panel-soft);color:var(--primary-dark);font-weight:900}.option-button.is-correct{border-color:var(--primary);background:var(--primary-soft)}.option-button.is-correct .option-letter{background:var(--primary);color:#fff}.option-button.is-wrong{border-color:var(--coral);background:var(--coral-soft)}.option-button.is-wrong .option-letter{background:var(--coral);color:#fff}.option-button.is-muted{opacity:.5}.show-answer-button{width:100%;margin-top:16px;justify-content:center;font-size:.95rem}.feedback{display:grid;gap:8px;border-radius:8px;margin-top:16px;padding:14px}.feedback p{margin:0;line-height:1.55}.feedback-title{display:flex;align-items:center;gap:8px}.feedback-correct{border:1px solid rgba(79,70,229,.32);background:var(--primary-soft)}.feedback-wrong{border:1px solid rgba(239,68,68,.36);background:var(--coral-soft)}.feedback-empty{border:1px solid rgba(215,151,43,.36);background:var(--amber-soft);color:var(--ink)}.copy-prompt-button{display:inline-flex;align-items:center;justify-content:center;gap:6px;width:100%;min-height:38px;margin-top:12px;border:1px solid var(--line);border-radius:6px;background:var(--panel-soft);color:var(--primary-dark);font-size:.88rem;font-weight:750;padding:6px 12px;transition:background .16s ease,transform .16s ease}.copy-prompt-button:hover{background:var(--line);transform:translateY(-1px)}.copy-prompt-button:active{transform:translateY(0)}.quiz-actions{display:grid;grid-template-columns:1fr;gap:10px;margin-top:16px}.score-panel{display:grid;grid-template-columns:1fr;gap:10px}.score-row{grid-template-columns:1fr auto;align-items:center}.score-row span{color:var(--muted);font-weight:750}.score-row strong{font-size:1.45rem}.results-layout{display:grid;gap:16px}.result-summary{display:flex;flex-direction:column;align-items:flex-start;gap:18px;padding:24px}.result-icon{display:grid;width:76px;height:76px;flex:0 0 auto;place-items:center;border-radius:8px;background:var(--amber-soft);color:var(--amber)}.result-summary h2{margin-bottom:6px;font-size:2rem}.result-summary p:last-child{margin:0;color:var(--muted);font-weight:650}.result-actions{display:grid;grid-template-columns:1fr;gap:10px}.review-list{display:grid;gap:10px}.review-item{overflow:hidden;border:1px solid var(--line);border-radius:8px;background:var(--panel)}.review-item summary{display:flex;min-height:56px;align-items:center;justify-content:space-between;gap:12px;padding:12px 14px;list-style:none;cursor:pointer}.review-item summary::-webkit-details-marker{display:none}.review-state{display:inline-flex;align-items:center;gap:7px;font-weight:850}.review-state.is-correct{color:var(--primary-dark)}.review-state.is-wrong{color:var(--coral)}.review-state.is-empty{color:var(--amber)}.empty-response-text{color:var(--amber);font-weight:700}.review-body{display:grid;gap:10px;border-top:1px solid var(--line);background:var(--panel-soft);padding:14px}.review-body p{margin:0;line-height:1.55}.review-question{border-radius:8px;background:var(--panel);padding:12px}.review-question .question-line{font-size:.98rem;line-height:1.55}@media (min-width: 620px){.app-shell{width:min(100% - 32px,1180px);padding-top:24px}.topbar{flex-direction:row;align-items:center;justify-content:space-between}.top-stats{justify-content:flex-end}.result-summary{flex-direction:row;align-items:center}.topic-panel,.quiz-panel,.review-section{padding:22px}.topic-grid{grid-template-columns:repeat(auto-fit,minmax(175px,1fr));gap:10px}.topic-tile{min-height:76px;padding:13px;gap:12px}.topic-tile span{font-size:1rem;line-height:1.25}.topic-tile strong{width:44px;height:44px;font-size:.95rem}.segmented-control{grid-template-columns:1fr 1fr}.count-control{grid-template-columns:1fr 86px}.quiz-actions{grid-template-columns:160px 1fr}.result-actions{grid-template-columns:1fr 1fr}.score-panel{grid-template-columns:repeat(4,1fr)}.option-button{grid-template-columns:42px minmax(0,1fr);min-height:58px}h1{font-size:1.78rem}}@media (min-width: 900px){.setup-layout,.quiz-layout{grid-template-columns:minmax(0,1fr) 330px}.test-panel,.score-panel{position:sticky;top:18px;padding:20px}.score-panel{grid-template-columns:1fr}}