:root{
  --bg:#f4f7fb;
  --surface:#ffffff;
  --surface-2:#f8fafc;
  --border:#e5eaf1;
  --text:#172033;
  --muted:#718096;
  --primary:#2563eb;
  --primary-dark:#1d4ed8;
  --sidebar:#0f172a;
  --sidebar-2:#111c31;
  --success:#16a34a;
  --warning:#d97706;
  --danger:#dc2626;
  --shadow:0 8px 28px rgba(15,23,42,.07);
  --radius:14px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:15px;
  line-height:1.5;
}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--primary-dark)}
button,input,select,textarea{font:inherit}
.layout{min-height:100vh;display:flex}
.sidebar{
  width:250px;flex:0 0 250px;background:linear-gradient(180deg,var(--sidebar),#0b1220);
  color:#fff;padding:26px 16px;display:flex;flex-direction:column;
  position:fixed;left:0;top:0;bottom:0;
}
.brand{font-size:24px;font-weight:800;letter-spacing:1.5px;padding:4px 14px 28px}
.sidebar nav{display:flex;flex-direction:column;gap:6px}
.sidebar nav a,.logout{
  color:#cbd5e1;padding:12px 14px;border-radius:10px;font-weight:600;
  transition:.15s ease;display:block;
}
.sidebar nav a:hover,.sidebar nav a.active{
  background:rgba(255,255,255,.09);color:#fff;
}
.logout{margin-top:auto}
.logout:hover{background:rgba(255,255,255,.07);color:#fff}
.main{margin-left:250px;width:calc(100% - 250px);padding:30px 34px 50px}
.top{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:26px;
}
.top h1{font-size:28px;line-height:1.2;margin:0 0 4px;font-weight:750}
.muted{color:var(--muted)}
.toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:0 0 18px}
.cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-bottom:22px}
.stat{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:20px 22px;box-shadow:var(--shadow);
}
.stat span{display:block;color:var(--muted);font-size:13px;font-weight:600;margin-bottom:7px}
.stat strong{font-size:25px;line-height:1.2}
.panel{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:22px;margin-bottom:20px;overflow:auto;
}
.panel h2{margin:0 0 18px;font-size:19px}
.panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
table{width:100%;border-collapse:collapse;min-width:650px}
th{
  text-align:left;font-size:12px;text-transform:uppercase;letter-spacing:.04em;
  color:#64748b;background:var(--surface-2);padding:12px 13px;border-bottom:1px solid var(--border)
}
td{padding:14px 13px;border-bottom:1px solid #edf1f5;vertical-align:middle}
tr:last-child td{border-bottom:0}
tbody tr:hover{background:#fafcff}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  min-height:40px;padding:9px 15px;border:1px solid var(--border);
  border-radius:9px;background:#fff;color:#334155;font-weight:700;cursor:pointer;
  transition:.15s ease;white-space:nowrap;
}
.btn:hover{background:#f8fafc;color:#0f172a}
.btn.primary{background:var(--primary);border-color:var(--primary);color:#fff}
.btn.primary:hover{background:var(--primary-dark);border-color:var(--primary-dark)}
.btn.small{min-height:34px;padding:7px 11px;font-size:13px}
.alert{border-radius:10px;padding:12px 14px;margin-bottom:18px;font-weight:600}
.alert.danger{background:#fef2f2;color:#991b1b;border:1px solid #fecaca}
.badge{
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:999px;padding:4px 9px;font-size:12px;font-weight:800;
}
.badge.ok{background:#dcfce7;color:#166534}
.badge.warn{background:#fef3c7;color:#92400e}
.badge.bad{background:#fee2e2;color:#991b1b}
.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.grid3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
label{display:block;color:#334155;font-weight:650;margin-bottom:15px}
input,select,textarea{
  width:100%;margin-top:7px;background:#fff;border:1px solid #d9e0e9;
  border-radius:9px;padding:11px 12px;outline:none;color:var(--text);
  transition:border-color .15s,box-shadow .15s;
}
input:focus,select:focus,textarea:focus{
  border-color:#7aa2f7;box-shadow:0 0 0 3px rgba(37,99,235,.10)
}
textarea{min-height:95px;resize:vertical}
.actions{display:flex;justify-content:flex-end;gap:10px;margin-top:18px}
dialog{
  border:0;border-radius:16px;padding:0;width:min(680px,calc(100vw - 30px));
  box-shadow:0 24px 80px rgba(15,23,42,.25);
}
dialog::backdrop{background:rgba(15,23,42,.58)}
.dialog{padding:28px}
.dialog h2{margin:0 0 22px;font-size:22px}
.installment-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin:10px 0 12px}
.installment-head strong{font-size:15px}
.installment-head+.installment-head{}
.installment-head ~ .installment-head{}
.installment-head + #installments{}
#installments{display:flex;flex-direction:column;gap:10px}
#installments .inst{background:#f8fafc;border:1px solid var(--border);border-radius:10px;padding:12px}
#installments .inst label{margin:0}
.summary{padding:12px 14px;background:#f8fafc;border:1px solid var(--border);border-radius:10px;margin:12px 0}
.schedule{background:#f8fafc;border:1px solid var(--border);border-radius:11px;padding:15px}
.schedule p{margin:8px 0}
footer{color:var(--muted);padding:20px 0}
@media(max-width:1000px){
  .cards{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:760px){
  .sidebar{width:76px;flex-basis:76px;padding:20px 10px}
  .brand{font-size:15px;padding:4px 6px 24px}
  .sidebar nav a,.logout{font-size:0;text-align:center;padding:12px 6px}
  .main{margin-left:76px;width:calc(100% - 76px);padding:22px 16px}
  .grid2,.grid3{grid-template-columns:1fr}
  .cards{grid-template-columns:1fr}
}