:root{color-scheme:light dark;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;--bg: #ffffff;--surface: #f5f6f8;--surface-2: #ececf0;--text: #1a1a1f;--muted: #5a5a66;--border: #d9d9e0;--accent: #4f46e5;--accent-contrast: #ffffff;--done: #16a34a;--progress-fill: #4f46e5}:root[data-theme=dark]{--bg: #16161c;--surface: #1f1f29;--surface-2: #2a2a36;--text: #ededf2;--muted: #a0a0ad;--border: #353543;--accent: #818cf8;--accent-contrast: #16161c;--done: #4ade80;--progress-fill: #818cf8}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}a{color:var(--accent)}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}.topbar{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.75rem 1rem;border-bottom:1px solid var(--border);background:var(--surface);position:sticky;top:0;z-index:10}.brand{font-weight:700;font-size:1.1rem;text-decoration:none;color:var(--text)}.topbar-actions{display:flex;gap:.5rem}button,select,input,textarea{font:inherit}button{cursor:pointer;border:1px solid var(--border);background:var(--surface-2);color:var(--text);border-radius:8px;padding:.4rem .75rem}button:hover{border-color:var(--accent)}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.app{max-width:960px;margin:0 auto;padding:1rem}.progress{margin-bottom:1.5rem}.progress-bar{height:14px;background:var(--surface-2);border-radius:999px;overflow:hidden}.progress-fill{height:100%;background:var(--progress-fill);transition:width .3s ease}.progress-text{margin:.4rem 0 0;color:var(--muted);font-size:.9rem}.filters{display:flex;flex-direction:column;gap:.75rem;margin-bottom:1.25rem}.search input{width:100%;padding:.6rem .8rem;border:1px solid var(--border);border-radius:8px;background:var(--bg);color:var(--text)}.chips{display:flex;flex-wrap:wrap;gap:.5rem}.chip{border-radius:999px;padding:.3rem .75rem;font-size:.85rem;background:var(--surface)}.chip--active{background:var(--accent);color:var(--accent-contrast);border-color:var(--accent)}.lesson-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.75rem}.lesson-card{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.85rem 1rem;background:var(--surface);border:1px solid var(--border);border-left:4px solid var(--border);border-radius:10px}.lesson-card.status-zrobiona{border-left-color:var(--done)}.lesson-card.status-w-trakcie{border-left-color:var(--accent)}.lesson-link{display:flex;flex-direction:column;gap:.25rem;text-decoration:none;color:var(--text);flex:1}.lesson-meta{font-size:.8rem;color:var(--muted)}.lesson-title{font-weight:600}.lesson-tags{display:flex;flex-wrap:wrap;gap:.35rem}.tag{font-size:.75rem;background:var(--surface-2);color:var(--muted);padding:.1rem .5rem;border-radius:999px}.lesson-status{font-size:.8rem;padding:.25rem .6rem;border-radius:999px;white-space:nowrap;background:var(--surface-2);color:var(--muted)}.badge-zrobiona{background:color-mix(in srgb,var(--done) 25%,transparent);color:var(--done)}.badge-w-trakcie{background:color-mix(in srgb,var(--accent) 25%,transparent);color:var(--accent)}.empty{color:var(--muted);text-align:center;padding:2rem 0}.lesson-detail h1{margin:.5rem 0}.back{display:inline-block;margin-bottom:.5rem;text-decoration:none}.lesson-desc{margin:1rem 0 1.5rem;line-height:1.6}.field{display:flex;flex-direction:column;gap:.4rem;margin-bottom:1.25rem}.field>span{font-weight:600;font-size:.9rem}.field select,.field textarea{padding:.5rem .7rem;border:1px solid var(--border);border-radius:8px;background:var(--bg);color:var(--text);resize:vertical}@media (max-width: 560px){.lesson-card{flex-direction:column;align-items:flex-start}.topbar{flex-wrap:wrap}}