:root{
  --brand:#4f46e5;
  --brand-dark:#3730a3;
  --bg:#f4f6fb;
  --sidebar:#111827;
  --sidebar-hover:#1f2937;
  --card:#ffffff;
  --text:#1f2937;
  --muted:#6b7280;
  --danger:#ef4444;
  --success:#16a34a;
  --warning:#f59e0b;
  --radius:14px;
}
*{box-sizing:border-box;}
body{
  margin:0;
  font-family:'Segoe UI',system-ui,-apple-system,sans-serif;
  background:var(--bg);
  color:var(--text);
}
a{text-decoration:none;color:inherit;}

/* Layout */
.layout{display:flex;min-height:100vh;}
.sidebar{
  width:250px;
  background:linear-gradient(180deg,var(--sidebar),#0b1220);
  color:#e5e7eb;
  flex-shrink:0;
  padding:22px 0;
  position:sticky;top:0;height:100vh;
}
.sidebar .brand{
  display:flex;align-items:center;gap:10px;
  padding:0 22px 22px 22px;
  font-size:19px;font-weight:700;color:#fff;
  border-bottom:1px solid rgba(255,255,255,.08);
  margin-bottom:14px;
}
.sidebar .brand span.dot{
  width:10px;height:10px;border-radius:50%;
  background:var(--brand);display:inline-block;
}
.sidebar nav a{
  display:flex;align-items:center;gap:12px;
  padding:12px 22px;
  color:#9ca3af;font-size:14.5px;font-weight:500;
  border-left:3px solid transparent;
  transition:.15s;
}
.sidebar nav a:hover, .sidebar nav a.active{
  background:var(--sidebar-hover);
  color:#fff;
  border-left-color:var(--brand);
}
.main{flex:1;min-width:0;}
.menu-toggle{
  display:none;
  background:none;border:none;
  font-size:22px;line-height:1;
  cursor:pointer;color:var(--text);
  margin-right:14px;padding:4px 8px;
}
.sidebar-overlay{
  display:none;
  position:fixed;inset:0;
  background:rgba(0,0,0,.45);
  z-index:35;
}
.sidebar-overlay.show{display:block;}
.topbar{
  background:var(--card);
  padding:16px 28px;
  display:flex;justify-content:space-between;align-items:center;
  border-bottom:1px solid #e5e7eb;
  position:sticky;top:0;z-index:5;
}
.topbar h1{font-size:19px;margin:0;font-weight:700;}
.topbar .user{font-size:14px;color:var(--muted);display:flex;gap:14px;align-items:center;}
.content{padding:26px 28px;}

/* Cards */
.card{
  background:var(--card);
  border-radius:var(--radius);
  padding:22px;
  box-shadow:0 1px 3px rgba(0,0,0,.05), 0 1px 2px rgba(0,0,0,.04);
  border:1px solid #edf0f5;
}
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;margin-bottom:24px;}
.stat-card{
  background:var(--card);border-radius:var(--radius);padding:20px 22px;
  border:1px solid #edf0f5;box-shadow:0 1px 3px rgba(0,0,0,.05);
}
.stat-card .label{font-size:13px;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.03em;}
.stat-card .value{font-size:28px;font-weight:700;margin-top:6px;}
.stat-card.brand{background:linear-gradient(135deg,var(--brand),var(--brand-dark));color:#fff;}
.stat-card.brand .label{color:rgba(255,255,255,.8);}
.stat-card.warning{border-left:4px solid var(--warning);}
.stat-card.danger{border-left:4px solid var(--danger);}
.stat-card.success{border-left:4px solid var(--success);}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;gap:6px;
  padding:9px 18px;border-radius:9px;border:none;
  font-size:14px;font-weight:600;cursor:pointer;
  transition:.15s;
}
.btn-primary{background:var(--brand);color:#fff;}
.btn-primary:hover{background:var(--brand-dark);}
.btn-outline{background:#fff;border:1px solid #d1d5db;color:var(--text);}
.btn-outline:hover{background:#f3f4f6;}
.btn-success{background:var(--success);color:#fff;}
.btn-danger{background:var(--danger);color:#fff;}
.btn-warning{background:var(--warning);color:#fff;}
.btn-sm{padding:6px 12px;font-size:12.5px;}

/* Table */
table{width:100%;border-collapse:collapse;font-size:14px;}
th{
  text-align:left;padding:12px 14px;background:#f9fafb;
  color:var(--muted);font-weight:600;font-size:12.5px;text-transform:uppercase;letter-spacing:.02em;
  border-bottom:1px solid #e5e7eb;
}
td{padding:13px 14px;border-bottom:1px solid #f1f3f7;}
tr:hover td{background:#fafbfe;}
.badge{padding:4px 10px;border-radius:20px;font-size:12px;font-weight:600;}
.badge-success{background:#dcfce7;color:#166534;}
.badge-danger{background:#fee2e2;color:#991b1b;}
.badge-warning{background:#fef3c7;color:#92400e;}

/* Forms */
label{font-size:13.5px;font-weight:600;display:block;margin-bottom:6px;color:#374151;}
input[type=text],input[type=number],input[type=password],input[type=date],input[type=file],select,textarea{
  width:100%;padding:10px 12px;border:1px solid #d1d5db;border-radius:9px;
  font-size:14px;margin-bottom:16px;background:#fff;
}
input:focus,select:focus,textarea:focus{outline:2px solid var(--brand);outline-offset:1px;border-color:var(--brand);}

/* Login page */
.login-wrap{
  min-height:100vh;display:flex;align-items:center;justify-content:center;
  position:relative;overflow:hidden;
  background:radial-gradient(circle at 20% 20%,#1e1b4b,#0b1220 55%),
             linear-gradient(135deg,#111827,#312e81);
  padding:24px;
}
.login-wrap::before, .login-wrap::after{
  content:'';position:absolute;border-radius:50%;
  background:radial-gradient(circle,rgba(99,102,241,.35),transparent 70%);
  filter:blur(10px);
}
.login-wrap::before{width:420px;height:420px;top:-140px;left:-120px;}
.login-wrap::after{width:360px;height:360px;bottom:-160px;right:-100px;
  background:radial-gradient(circle,rgba(79,70,229,.3),transparent 70%);}

.login-card{
  position:relative;z-index:1;
  background:rgba(255,255,255,.97);
  backdrop-filter:blur(6px);
  padding:44px 40px 32px;
  border-radius:20px;
  width:100%;max-width:400px;
  box-shadow:0 25px 60px rgba(0,0,0,.35),0 0 0 1px rgba(255,255,255,.06);
  border-top:4px solid var(--brand);
  animation:loginRise .35s ease-out;
}
@keyframes loginRise{
  from{opacity:0;transform:translateY(14px);}
  to{opacity:1;transform:translateY(0);}
}
.login-icon{
  width:56px;height:56px;margin:0 auto 18px;
  display:flex;align-items:center;justify-content:center;
  border-radius:16px;
  background:linear-gradient(135deg,var(--brand),var(--brand-dark));
  color:#fff;font-size:26px;font-weight:700;
  box-shadow:0 10px 24px rgba(79,70,229,.35);
}
.login-card h2{margin-top:0;text-align:center;font-size:22px;letter-spacing:-.01em;}
.login-card .btn-primary{padding:11px 18px;font-size:14.5px;box-shadow:0 8px 18px rgba(79,70,229,.3);}
.login-card input:focus{box-shadow:0 0 0 3px rgba(79,70,229,.15);}
.login-credit{
  text-align:center;margin-top:22px;padding-top:16px;
  border-top:1px solid #eef0f4;
  color:#9ca3af;font-size:11.5px;letter-spacing:.02em;
}
.alert{padding:12px 14px;border-radius:9px;font-size:14px;margin-bottom:16px;}
.alert-danger{background:#fee2e2;color:#991b1b;}
.alert-success{background:#dcfce7;color:#166534;}

/* Modal */
.modal-overlay{
  display:none;position:fixed;inset:0;background:rgba(17,24,39,.55);
  align-items:center;justify-content:center;z-index:50;
}
.modal-overlay.open{display:flex;}
.modal-box{
  background:#fff;border-radius:16px;padding:26px;width:100%;max-width:460px;
  max-height:90vh;overflow-y:auto;
}
.modal-box h3{margin-top:0;}
.modal-close{float:right;cursor:pointer;font-size:20px;color:var(--muted);}

@media(max-width:820px){
  .sidebar{position:fixed;left:-260px;transition:.2s;z-index:40;}
  .sidebar.open{left:0;}
  .menu-toggle{display:inline-block;}
  .content{padding:16px;}
}