:root{--bg: #f8fafc;--surface: #ffffff;--border: #e2e8f0;--text: #0f172a;--text-muted: #64748b;--primary: #6a4cff;--primary-contrast: #ffffff;--brand-purple: #6a4cff;--brand-violet: #ab55f7;--brand-cyan: #22d3ee;--brand-green: #10b981;--brand-amber: #fbbf24;--brand-gradient: linear-gradient(100deg, #6a4cff 0%, #ab55f7 45%, #22d3ee 100%);--brand-gradient-btn: linear-gradient(100deg, #6a4cff 0%, #8b5cf6 55%, #4361ee 100%);--libre-bg: #f1f5f9;--libre-fg: #475569;--pendiente-bg: #fef9c3;--pendiente-fg: #854d0e;--apartado-bg: #ffedd5;--apartado-fg: #9a3412;--pagado-bg: #dcfce7;--pagado-fg: #166534}@media (prefers-color-scheme: dark){:root{--bg: #0b0b16;--surface: #16141f;--border: #2b2838;--text: #f2f2f7;--text-muted: #9a9aa8;--primary: #8b7bff;--primary-contrast: #ffffff;--libre-bg: #1b1926;--libre-fg: #9a9aa8;--pendiente-bg: #3a2f0b;--pendiente-fg: #fde68a;--apartado-bg: #3a1f0d;--apartado-fg: #fed7aa;--pagado-bg: #0c2c1b;--pagado-fg: #86efac}}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:Poppins,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5}a{color:var(--primary)}button{font:inherit;cursor:pointer;border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:8px;padding:.5rem .9rem}button.primary{background:var(--brand-gradient-btn);background-color:var(--primary);color:#fff;border:none;font-weight:600}button:disabled{opacity:.5;cursor:not-allowed}input,select,textarea{font:inherit;color:var(--text);background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:.5rem .7rem;width:100%}.container{max-width:960px;margin:0 auto;padding:1.5rem 1rem 4rem}.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:1.25rem}.muted{color:var(--text-muted)}.row{display:flex;gap:.75rem;align-items:center;flex-wrap:wrap}.field{margin-bottom:.9rem}.field label{display:block;font-size:.85rem;font-weight:600;margin-bottom:.3rem}.error{color:#dc2626;font-size:.9rem}