:root{--bg: #f5f5f5;--surface: #ffffff;--primary: #2563eb;--primary-dark: #1d4ed8;--danger: #dc2626;--success: #16a34a;--warning: #f59e0b;--text: #1e293b;--text-muted: #64748b;--border: #e2e8f0;--radius: 8px;--shadow: 0 1px 3px rgba(0,0,0,.1);--sidebar: 240px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}button,.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border:none;border-radius:var(--radius);font-size:14px;font-weight:500;cursor:pointer;transition:background .15s}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}.btn-danger{background:var(--danger);color:#fff}.btn-success{background:var(--success);color:#fff}.btn-outline{background:transparent;border:1px solid var(--border);color:var(--text)}.btn-outline:hover{background:var(--bg)}.btn-sm{padding:4px 10px;font-size:13px}input,select,textarea{padding:8px 12px;border:1px solid var(--border);border-radius:var(--radius);font-size:14px;font-family:inherit;width:100%;background:var(--surface);color:var(--text)}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px #2563eb33}label{display:block;font-size:13px;font-weight:600;margin-bottom:4px;color:var(--text-muted)}.form-group{margin-bottom:16px}.card{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px;margin-bottom:16px}table{width:100%;border-collapse:collapse;font-size:14px}th,td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--border)}th{font-weight:600;color:var(--text-muted);font-size:13px}.badge{display:inline-block;padding:2px 8px;border-radius:12px;font-size:12px;font-weight:600}.badge-active{background:#dcfce7;color:#166534}.badge-done{background:#dbeafe;color:#1e40af}.badge-cancelled{background:#fee2e2;color:#991b1b}.badge-paid{background:#dcfce7;color:#166534}.badge-unpaid{background:#fef3c7;color:#92400e}.grid{display:grid;gap:16px}.grid-2{grid-template-columns:1fr 1fr}.grid-3{grid-template-columns:1fr 1fr 1fr}@media(max-width:768px){.grid-2,.grid-3{grid-template-columns:1fr}}