:root{--bg: #0f1419;--surface: #182028;--surface-2: #212b35;--border: #2c3743;--text: #e8eef5;--muted: #93a1b0;--accent: #4da3ff;--accent-ink: #04121f;--right: #2ea36b;--right-bg: #12321f;--wrong: #e0524b;--wrong-bg: #351715;--radius: 14px;--gap: 14px;color-scheme:dark}@media(prefers-color-scheme:light){:root{--bg: #f6f8fa;--surface: #ffffff;--surface-2: #eef2f6;--border: #d8e0e8;--text: #16202b;--muted: #5b6b7c;--accent: #0b62c4;--accent-ink: #ffffff;--right: #1c7f4d;--right-bg: #e2f5ea;--wrong: #c0322b;--wrong-bg: #fdeaea;color-scheme:light}}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;font-size:17px;line-height:1.45;-webkit-text-size-adjust:100%;overscroll-behavior-y:none}button,select{font:inherit;color:inherit}.screen{max-width:720px;margin:0 auto;padding:0 16px calc(120px + env(safe-area-inset-bottom));min-height:100dvh}.screen.center{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--gap);text-align:center;padding-bottom:0}.topbar{display:flex;align-items:center;gap:12px;padding:calc(12px + env(safe-area-inset-top)) 0 12px;position:sticky;top:0;background:var(--bg);z-index:5}.topbar h1{font-size:1.25rem;margin:0;flex:1}.icon-link{display:grid;place-items:center;width:40px;height:40px;border-radius:999px;background:var(--surface);color:var(--text);text-decoration:none;font-size:1.1rem;flex:none}.stats-row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:var(--gap)}.stat{background:var(--surface);border-radius:var(--radius);padding:14px 10px;text-align:center}.stat-value{display:block;font-size:1.5rem;font-weight:650}.stat-label{display:block;font-size:.78rem;color:var(--muted)}.cta{display:block;background:var(--accent);color:var(--accent-ink);border-radius:var(--radius);padding:20px;text-decoration:none;margin-bottom:var(--gap)}.cta.secondary{background:var(--surface);color:var(--text);border:1px solid var(--border)}.cta-title{display:block;font-size:1.2rem;font-weight:650}.cta-sub{display:block;font-size:.86rem;opacity:.85}.card{background:var(--surface);border-radius:var(--radius);padding:16px;margin-bottom:var(--gap)}.card h2,.group h2{font-size:.82rem;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);margin:0 0 10px}.card.hint{border:1px solid var(--accent)}.bar{height:8px;background:var(--surface-2);border-radius:999px;overflow:hidden}.bar-fill{height:100%;background:var(--accent)}.group{margin-bottom:22px}.chips{display:flex;flex-wrap:wrap;gap:8px}.chip{background:var(--surface);border:1px solid var(--border);border-radius:999px;padding:9px 14px;font-size:.9rem;cursor:pointer}.chip.on{background:var(--accent);border-color:var(--accent);color:var(--accent-ink);font-weight:600}.select{width:100%;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:13px}.toggle{display:flex;gap:12px;align-items:flex-start;background:var(--surface);border-radius:var(--radius);padding:14px;margin-bottom:10px;cursor:pointer}.toggle input{width:22px;height:22px;margin:2px 0 0;flex:none;accent-color:var(--accent)}.toggle-label{display:block;font-weight:550;margin-bottom:2px}.progress{flex:1;height:6px;background:var(--surface-2);border-radius:999px;overflow:hidden}.progress-fill{height:100%;background:var(--accent);transition:width .2s ease}.counter{font-size:.85rem;color:var(--muted);font-variant-numeric:tabular-nums}.question-area{padding:8px 0 18px}.question-source{font-size:.76rem;color:var(--muted);margin:0 0 6px}.question-text{font-size:1.12rem;font-weight:550;line-height:1.4;margin:0}.question-note{background:var(--surface-2);border-radius:10px;padding:10px 12px;margin:12px 0 0;font-size:.9rem}.question-note-label{color:var(--muted);font-weight:650;margin-right:4px}.options{display:flex;flex-direction:column;gap:10px}.option{display:flex;gap:12px;align-items:flex-start;text-align:left;background:var(--surface);border:1.5px solid var(--border);border-radius:var(--radius);padding:14px;cursor:pointer;min-height:56px}.option.chosen{border-color:var(--accent)}.option.right{border-color:var(--right);background:var(--right-bg)}.option.wrong{border-color:var(--wrong);background:var(--wrong-bg)}.option-letter{flex:none;width:26px;height:26px;display:grid;place-items:center;border-radius:999px;background:var(--surface-2);font-size:.82rem;font-weight:650}.option-text{flex:1}.sticky-footer{position:fixed;left:0;right:0;bottom:0;display:flex;align-items:center;gap:10px;padding:12px 16px calc(12px + env(safe-area-inset-bottom));background:linear-gradient(to top,var(--bg) 70%,transparent);max-width:720px;margin:0 auto}.sticky-footer p{flex:1;margin:0}button.primary,.primary.as-button{background:var(--accent);color:var(--accent-ink);border:none;border-radius:var(--radius);padding:15px 22px;font-weight:650;cursor:pointer;text-decoration:none;text-align:center;flex:1}button.primary:disabled{opacity:.4;cursor:not-allowed}button.ghost,.ghost.as-button{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:15px 22px;cursor:pointer;flex:1}.ghost.as-button{color:inherit;text-decoration:none;text-align:center}.actions{display:flex;gap:10px;margin-bottom:22px}.confidence-footer{gap:8px}button.confidence{display:flex;flex-direction:column;align-items:center;gap:4px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:10px 6px;font-size:.8rem;font-weight:600;cursor:pointer;flex:1}button.confidence span{font-size:1.3rem}.note-input{width:100%;background:var(--surface-2);border:1px solid var(--border);border-radius:10px;padding:10px;margin-top:10px;font:inherit;color:inherit;resize:vertical}.accordion-header{display:flex;justify-content:space-between;align-items:center;gap:10px;width:100%;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:14px;text-align:left;cursor:pointer;margin-bottom:8px}.accordion-body{display:flex;flex-direction:column;gap:8px;margin:0 0 14px}.convocatoria-row{display:flex;justify-content:space-between;align-items:center;gap:12px;width:100%;background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius);padding:12px 14px;text-align:left;cursor:pointer}.convocatoria-row:disabled{opacity:.5;cursor:wait}.convocatoria-title{display:block;font-weight:550}.search-count{margin:10px 0 14px}.score{text-align:center;padding:26px 0 18px}.score-value{font-size:3.4rem;font-weight:700;line-height:1;font-variant-numeric:tabular-nums}.score-label{display:block;color:var(--muted);font-size:.9rem;margin-bottom:8px}.review h2{font-size:.82rem;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}.review-card{background:var(--surface);border-left:3px solid var(--border);border-radius:var(--radius);padding:14px;margin-bottom:12px}.review-card.right{border-left-color:var(--right)}.review-card.wrong{border-left-color:var(--wrong)}.review-question{margin:0 0 10px;font-weight:550}.review-options{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}.review-options li{display:flex;gap:10px;align-items:flex-start;font-size:.92rem;padding:8px;border-radius:10px}.review-options li.right{background:var(--right-bg);color:var(--right);font-weight:550}.review-options li.wrong{background:var(--wrong-bg);color:var(--wrong)}.muted{color:var(--muted)}.small{font-size:.84rem}.link{color:var(--accent)}.spinner{width:30px;height:30px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:999px;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}