:root{--bg: #f4f5f7;--surface: #ffffff;--surface-2: #f8fafc;--border: #e2e8f0;--text: #1e293b;--text-dim: #64748b;--primary: #2b5fd9;--primary-contrast: #ffffff;--danger: #dc2626;--success: #15803d;--warn: #b45309;--overdue-bg: #fef2f2;--overdue-border: #fecaca;--radius: 10px;--shadow: 0 1px 2px rgba(15, 23, 42, .06), 0 1px 3px rgba(15, 23, 42, .1)}@media(prefers-color-scheme:dark){:root{--bg: #0f172a;--surface: #1e293b;--surface-2: #172033;--border: #334155;--text: #e2e8f0;--text-dim: #94a3b8;--primary: #5b8def;--primary-contrast: #0b1220;--overdue-bg: #3f1d1d;--overdue-border: #7f1d1d;--shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 1px 3px rgba(0, 0, 0, .4)}}*{box-sizing:border-box}html,body{margin:0;padding:0;min-height:100%}body{background:var(--bg);color:var(--text);font:15px/1.5 -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}h1,h2,h3{margin:0 0 .5rem;line-height:1.25}button{font:inherit;cursor:pointer}input,select,textarea{font:inherit;color:var(--text);background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:.5rem .65rem}input:focus,select:focus,textarea:focus,button:focus-visible{outline:2px solid var(--primary);outline-offset:1px}.btn{border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:8px;padding:.5rem .9rem;font-weight:600}.btn:hover{background:var(--surface-2)}.btn-primary{background:var(--primary);border-color:var(--primary);color:var(--primary-contrast)}.btn-primary:hover{filter:brightness(1.05);background:var(--primary)}.btn-danger{color:var(--danger);border-color:var(--overdue-border)}.btn-sm{padding:.3rem .6rem;font-size:.85rem}.field{display:flex;flex-direction:column;gap:.3rem;margin-bottom:.9rem}.field>label{font-weight:600;font-size:.85rem;color:var(--text-dim)}.error-text{color:var(--danger);font-size:.88rem}