:root{--bg:#f4f8ff;--card:#ffffff;--text:#0f172a;--muted:#475569;--blue:#1d4ed8;--blue-soft:#dbeafe;--border:#cbd5e1;--danger:#b91c1c}*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;color:var(--text);background:linear-gradient(180deg,#eef5ff,#f8fbff 55%,#ffffff)}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:1040px;margin:0 auto;padding:1.25rem}.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:1.25rem;margin-bottom:1.1rem;box-shadow:0 8px 24px rgba(15,23,42,.06)}h1,h2,h3{margin-top:0}form{grid-gap:.75rem;gap:.75rem}form,label{display:grid}label{grid-gap:.35rem;gap:.35rem;font-weight:600}button,input,select,textarea{font:inherit}input,select,textarea{width:100%;border:1px solid var(--border);border-radius:10px;padding:.65rem .75rem;background:#fff}button{border:none;border-radius:10px;padding:.7rem 1rem;background:var(--blue);color:white;font-weight:700;cursor:pointer}button.secondary{background:#334155}button.danger{background:#b91c1c}button.link{background:transparent;color:var(--blue);padding:0}.muted{color:var(--muted);font-size:.95rem}.error{color:var(--danger);font-weight:700}.topbar{display:flex;justify-content:space-between;gap:.75rem;margin-bottom:1rem}.badge,.topbar{align-items:center}.badge{display:inline-flex;border-radius:999px;padding:.2rem .6rem;font-size:.8rem;font-weight:700;background:var(--blue-soft);color:#1e3a8a}.grid{display:grid;grid-gap:1.1rem;gap:1.1rem}@media (min-width:720px){.grid.two{grid-template-columns:1fr 1fr}}.day-list{display:grid;grid-template-columns:repeat(1,minmax(0,1fr));grid-gap:.75rem;gap:.75rem}@media (min-width:620px){.day-list{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (min-width:860px){.day-list{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (min-width:1060px){.day-list{grid-template-columns:repeat(4,minmax(0,1fr))}}.day-item{border:1px solid var(--border);border-radius:12px;padding:1rem;background:white}.day-item.locked{opacity:.7}.drop-zone{border:1px dashed var(--border);border-radius:8px;padding:.65rem;background:#f8fbff}.day-item h3{margin-bottom:.4rem}.module-card p{margin:.35rem 0}.action-row{display:flex;gap:.55rem;align-items:center;flex-wrap:wrap;margin-top:.7rem}.button-link{display:inline-flex;align-items:center;justify-content:center;border-radius:10px;border:1px solid #bfdbfe;background:#eff6ff;color:#1e3a8a;font-weight:600;padding:.45rem .7rem;text-decoration:none}.button-link:hover{background:#dbeafe;text-decoration:none}.file-list{display:grid;grid-gap:.5rem;gap:.5rem;padding-left:1rem}