:root{--bg:#f6f7fb;--surface:#fff;--surface-muted:#eef0f6;--text:#1f2333;--text-muted:#5b6275;--border:#dde1ea;--accent:#4f46e5;--accent-hover:#4338ca;--on-accent:#fff;--danger:#c2333b;--danger-soft:#fdecec;--success:#1c7c4c;--success-soft:#e3f5ea;--notice-soft:#fff6e0;--notice:#8a5a00;--shadow:0 1px 2px #1018280f, 0 4px 12px #1018280f;--radius:12px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial;--bg:#12141c;--surface:#1b1e29;--surface-muted:#262a3a;--text:#e8eaf2;--text-muted:#a0a6b8;--border:#30354a;--accent:#8b85ff;--accent-hover:#a29dff;--on-accent:#12141c;--danger:#f2777d;--danger-soft:#3a1f24;--success:#5cd49a;--success-soft:#173328;--notice-soft:#33290f;--notice:#f3c969;--shadow:none}}*,:before,:after{box-sizing:border-box}body{background:var(--bg);min-height:100vh;margin:0}h1,h2,h3,p{margin:0}h1,h2,h3{line-height:1.2}h1{font-size:1.75rem}h2{font-size:1.2rem}h3{font-size:1rem}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}[tabindex="-1"]:focus{outline:none}.app-header{background:var(--surface);border-bottom:1px solid var(--border)}.app-header-inner,.app-main{max-width:880px;margin:0 auto;padding-inline:20px}.app-header-inner{padding-block:14px}.brand{color:var(--text);align-items:center;gap:10px;font-size:1.1rem;font-weight:700;text-decoration:none;display:inline-flex}.app-main{flex-direction:column;gap:24px;padding-block:32px 64px;display:flex}.page-header{overflow-wrap:anywhere;flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:16px;display:flex}.stack{flex-direction:column;gap:16px;display:flex}.stack-sm{flex-direction:column;gap:6px;display:flex}.actions{flex-wrap:wrap;gap:8px;display:flex}.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px}.muted{color:var(--text-muted)}.description{white-space:pre-wrap;overflow-wrap:anywhere}.label{letter-spacing:.06em;text-transform:uppercase;color:var(--text-muted);font-size:.75rem;font-weight:700;display:block}.back-link{color:var(--text-muted);align-self:flex-start;font-weight:600;text-decoration:none}.back-link:hover{color:var(--accent)}.notice{background:var(--notice-soft);color:var(--notice);border-radius:8px;padding:10px 14px;font-weight:500}.empty-state{border:2px dashed var(--border);border-radius:var(--radius);text-align:center;flex-direction:column;align-items:center;gap:12px;padding:48px 24px;display:flex}.empty-state .btn{white-space:normal;overflow-wrap:anywhere;margin-top:8px}.btn{border:1px solid var(--border);background:var(--surface);color:var(--text);font:inherit;white-space:nowrap;cursor:pointer;border-radius:8px;justify-content:center;align-items:center;gap:6px;padding:8px 16px;font-size:.95rem;font-weight:600;text-decoration:none;transition:background-color .15s,border-color .15s;display:inline-flex}.btn:hover:not(:disabled){background:var(--surface-muted)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{border-color:var(--accent);background:var(--accent);color:var(--on-accent)}.btn-primary:hover:not(:disabled){border-color:var(--accent-hover);background:var(--accent-hover)}.btn-danger{color:var(--danger)}.btn-danger:hover:not(:disabled){border-color:var(--danger);background:var(--danger-soft)}.btn-small{padding:4px 10px;font-size:.85rem}.form{flex-direction:column;gap:16px;display:flex}.field{flex-direction:column;gap:6px;font-size:.9rem;font-weight:600;display:flex}.field .muted{font-weight:400}.field input,.field textarea{border:1px solid var(--border);background:var(--bg);width:100%;color:var(--text);font:inherit;resize:vertical;border-radius:8px;padding:10px 12px;font-size:1rem;font-weight:400}.field input:focus,.field textarea:focus{border-color:var(--accent);outline:1px solid var(--accent);outline-offset:0}.card-form{grid-template-columns:minmax(0,1fr) minmax(0,2fr);gap:12px 16px;display:grid}.card-form .actions{grid-column:1/-1}.set-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px;margin:0;padding:0;list-style:none;display:grid}.set-tile{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);height:100%;box-shadow:var(--shadow);flex-direction:column;gap:4px;padding:20px;transition:border-color .15s,transform .15s;display:flex;position:relative}.set-tile:hover{border-color:var(--accent);transform:translateY(-2px)}.set-tile-link{color:var(--text);flex-direction:column;gap:4px;text-decoration:none;display:flex}.set-tile-link:after{content:"";border-radius:var(--radius);position:absolute;inset:-1px}.set-tile-link:focus-visible{outline:none}.set-tile-link:focus-visible:after{outline:2px solid var(--accent);outline-offset:2px}.set-tile-title{overflow-wrap:anywhere;font-size:1.1rem;font-weight:700}.set-tile-description{pointer-events:none;margin-top:6px;font-size:.9rem;position:relative}.set-tile-description-text{-webkit-line-clamp:2;overflow-wrap:anywhere;-webkit-box-orient:vertical;display:-webkit-box;overflow:hidden}.set-tile-description.expanded .set-tile-description-text{display:block}.set-tile-description-toggle{cursor:pointer;pointer-events:auto;background:0 0;border:0;border-radius:4px;padding:0;position:absolute;inset:0}.card-list{flex-direction:column;gap:8px;margin:0;padding:0;list-style:none;display:flex}.card-row{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);grid-template-columns:1.5rem minmax(0,1fr) minmax(0,2fr) auto;align-items:start;gap:16px;padding:14px 16px;display:grid}.card-row.editing{border-color:var(--accent);display:block}.card-number{color:var(--text-muted);font-variant-numeric:tabular-nums;padding-top:2px;font-size:.85rem}.card-term{font-weight:600}.card-term,.card-definition{white-space:pre-wrap;overflow-wrap:anywhere}.card-actions{gap:6px;display:flex}@media (width<=640px){.card-row{grid-template-columns:1.5rem minmax(0,1fr);gap:6px 12px}.card-definition,.card-actions{grid-column:2}.card-actions{margin-top:6px}.card-form{grid-template-columns:minmax(0,1fr)}}.quiz-progress{color:var(--text-muted);font-variant-numeric:tabular-nums;justify-content:space-between;font-size:.9rem;font-weight:600;display:flex}.progress-bar{background:var(--surface-muted);border-radius:999px;height:6px;overflow:hidden}.progress-bar>div{background:var(--accent);height:100%;transition:width .3s}.term-card{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow);text-align:center;flex-direction:column;gap:8px;padding:40px 24px;display:flex}.term-card .term{white-space:pre-wrap;overflow-wrap:anywhere;font-size:1.75rem;font-weight:700}.choices{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:0;padding:0;list-style:none;display:grid}@media (width<=640px){.choices{grid-template-columns:minmax(0,1fr)}}.choice{border:2px solid var(--border);border-radius:var(--radius);background:var(--surface);width:100%;height:100%;color:var(--text);font:inherit;text-align:left;cursor:pointer;align-items:flex-start;gap:12px;padding:14px 16px;transition:border-color .15s,background-color .15s,opacity .15s;display:flex}.choice:hover:not(:disabled){border-color:var(--accent)}.choice:disabled{cursor:default}.choice.correct{border-color:var(--success);background:var(--success-soft)}.choice.incorrect{border-color:var(--danger);background:var(--danger-soft)}.choice.dimmed{opacity:.55}.choice-key{background:var(--surface-muted);width:1.75rem;height:1.75rem;color:var(--text-muted);border-radius:6px;flex:none;place-items:center;font-size:.85rem;font-weight:700;display:grid}.choice.correct .choice-key{background:var(--success);color:var(--surface)}.choice.incorrect .choice-key{background:var(--danger);color:var(--surface)}.choice-text{white-space:pre-wrap;overflow-wrap:anywhere;padding-top:1px}.feedback{border-radius:var(--radius);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;font-weight:600;display:flex}.feedback.correct,.feedback.incorrect{padding:12px 12px 12px 16px}.feedback.correct{background:var(--success-soft);color:var(--success)}.feedback.incorrect{background:var(--danger-soft);color:var(--danger)}.results{text-align:center;overflow-wrap:anywhere;flex-direction:column;align-items:center;gap:12px;padding-block:36px;display:flex}.results-score{font-variant-numeric:tabular-nums;font-size:3rem;font-weight:800;line-height:1.1}.results-score .muted{font-size:1.25rem;font-weight:600}.missed-list{flex-direction:column;gap:12px;margin:0;padding:0;list-style:none;display:flex}.missed-list li{flex-direction:column;gap:10px;display:flex}.missed-term{overflow-wrap:anywhere;font-size:1.1rem;font-weight:700}.answer{white-space:pre-wrap;overflow-wrap:anywhere;display:block}.correct-text{color:var(--success)}.incorrect-text{color:var(--danger)}