:root {
  --bg: #f5f6f8; --card: #ffffff; --border: #e4e7ec; --text: #1a1d23; --muted: #6b7280;
  --primary: #2f6fed; --primary-dark: #2255c7; --success: #16a34a; --danger: #dc2626; --warn: #d97706;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, Segoe UI, Roboto, Arial, sans-serif; background: var(--bg); color: var(--text); }
a { color: var(--primary); text-decoration: none; }
.layout { display: flex; min-height: 100vh; }
.sidebar { width: 220px; background: #14161c; color: #cfd3dc; padding: 20px 0; flex-shrink: 0; }
.sidebar .brand { font-weight: 700; font-size: 18px; color: #fff; padding: 0 20px 20px; }
.sidebar a { display: block; padding: 10px 20px; color: #cfd3dc; font-size: 14px; }
.sidebar a:hover, .sidebar a.active { background: #23262f; color: #fff; }
.sidebar .logout { margin-top: 20px; border-top: 1px solid #2a2d36; padding-top: 12px; }
.main { flex: 1; padding: 28px 32px; max-width: 1200px; }
h1 { font-size: 20px; margin: 0 0 20px; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; margin-bottom: 28px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 16px 18px; }
.card .label { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.card .value { font-size: 24px; font-weight: 700; margin-top: 6px; }
table { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border); font-size: 14px; }
th { background: #fafbfc; color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; }
tr:last-child td { border-bottom: none; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 100px; font-size: 12px; font-weight: 600; }
.badge.paid { background: #dcfce7; color: var(--success); }
.badge.due { background: #fee2e2; color: var(--danger); }
.badge.partial { background: #fef3c7; color: var(--warn); }
.badge.active { background: #dcfce7; color: var(--success); }
.badge.inactive, .badge.terminated { background: #f1f2f4; color: var(--muted); }
.toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; gap: 12px; }
input, select { padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px; }
button, .btn { background: var(--primary); color: #fff; border: none; padding: 9px 16px; border-radius: 6px; font-size: 14px; cursor: pointer; }
button:hover, .btn:hover { background: var(--primary-dark); }
.login-page { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: var(--bg); }
.login-box { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 32px; width: 320px; }
.login-box h1 { text-align: center; }
.login-box input { width: 100%; margin-bottom: 12px; }
.error { background: #fee2e2; color: var(--danger); padding: 10px; border-radius: 6px; font-size: 13px; margin-bottom: 12px; }
.notice { background: #e0e7ff; color: #3730a3; padding: 10px; border-radius: 6px; font-size: 13px; margin-bottom: 16px; }
.form-inline { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; background: var(--card); border: 1px solid var(--border); padding: 16px; border-radius: 10px; margin-bottom: 20px; }
.form-inline input, .form-inline select { flex: 1; min-width: 140px; }
.muted { color: var(--muted); }