:root {
  --brand: #E63027;
  --brand-dark: #B5251F;
  --brand-light: #FDECEB;
  --secondary: #3A3A3A;
  --bg: #F5F6F8;
  --surface: #FFFFFF;
  --border: #E4E7EB;
  --text: #1F2937;
  --text-muted: #6B7280;
  --success: #16A34A;
  --warn: #F59E0B;
  --danger: #DC2626;
  --info: #2563EB;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.06);
  --shadow: 0 4px 12px rgba(0,0,0,.06);
  --r: 8px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Layout */
.app { display: flex; min-height: 100vh; }
.sidebar {
  width: 240px;
  background: var(--secondary);
  color: #fff;
  display: flex; flex-direction: column;
  position: fixed; left: 0; top: 0; bottom: 0;
  overflow-y: auto;
}
.sidebar .brand {
  padding: 20px 16px;
  border-bottom: 1px solid rgba(255,255,255,.08);
  display: flex; align-items: center; gap: 8px;
}
.sidebar .brand img { height: 28px; }
.sidebar .brand .text { font-weight: 700; letter-spacing: .5px; }
.sidebar nav { padding: 8px 0; flex: 1; }
.sidebar nav a {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 16px;
  color: rgba(255,255,255,.78);
  font-size: 13.5px;
  border-left: 3px solid transparent;
}
.sidebar nav a:hover { background: rgba(255,255,255,.06); color: #fff; text-decoration: none; }
.sidebar nav a.active { background: rgba(230,48,39,.18); color: #fff; border-left-color: var(--brand); }
.sidebar nav .section { padding: 16px 16px 6px; font-size: 11px; text-transform: uppercase; color: rgba(255,255,255,.4); letter-spacing: 1px; }
.sidebar .user {
  padding: 12px 16px; border-top: 1px solid rgba(255,255,255,.08);
  font-size: 12px; color: rgba(255,255,255,.7);
}
.sidebar .user form { margin-top: 6px; }
.sidebar .user button {
  background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.2);
  padding: 5px 10px; border-radius: 4px; cursor: pointer; font-size: 12px;
}
.sidebar .user button:hover { background: rgba(255,255,255,.1); }

.main { flex: 1; margin-left: 240px; padding: 24px 32px 40px; min-width: 0; }
.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.topbar h1 { margin: 0; font-size: 22px; color: var(--secondary); }
.topbar .actions { display: flex; gap: 8px; }

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  box-shadow: var(--shadow-sm);
  margin-bottom: 16px;
}
.card-header { padding: 14px 18px; border-bottom: 1px solid var(--border); font-weight: 600; color: var(--secondary); display: flex; justify-content: space-between; align-items: center; }
.card-body { padding: 18px; }
.card-footer { padding: 12px 18px; border-top: 1px solid var(--border); background: #FAFBFC; border-radius: 0 0 var(--r) var(--r); }

/* KPIs */
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; margin-bottom: 16px; }
.kpi {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 16px; box-shadow: var(--shadow-sm);
}
.kpi .label { color: var(--text-muted); font-size: 12px; text-transform: uppercase; letter-spacing: .5px; }
.kpi .value { font-size: 26px; font-weight: 700; color: var(--secondary); margin-top: 6px; }
.kpi .delta { font-size: 12px; margin-top: 4px; }
.kpi .delta.up { color: var(--success); }
.kpi .delta.down { color: var(--danger); }

/* Buttons */
.btn {
  display: inline-block;
  padding: 8px 16px; font-size: 13px; font-weight: 500;
  border: 1px solid transparent; border-radius: 6px;
  cursor: pointer; text-decoration: none;
  transition: all .15s ease;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); text-decoration: none; }
.btn-secondary { background: var(--secondary); color: #fff; }
.btn-secondary:hover { background: #1F1F1F; text-decoration: none; }
.btn-outline { background: transparent; border-color: var(--border); color: var(--text); }
.btn-outline:hover { background: var(--bg); text-decoration: none; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #B91C1C; text-decoration: none; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-block { display: block; width: 100%; text-align: center; }

/* Forms */
.form-group { margin-bottom: 14px; }
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; }
label { display: block; font-size: 12.5px; font-weight: 500; color: var(--secondary); margin-bottom: 4px; }
.form-control,
input[type=text], input[type=email], input[type=password], input[type=number], input[type=url], input[type=date], textarea, select {
  width: 100%; padding: 8px 12px; font-size: 14px;
  border: 1px solid var(--border); border-radius: 6px;
  background: #fff; color: var(--text);
}
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px rgba(230,48,39,.15); }
textarea { min-height: 80px; font-family: inherit; }
.form-help { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

/* Tables */
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); font-size: 13.5px; }
.table th { font-weight: 600; color: var(--secondary); background: #FAFBFC; font-size: 12px; text-transform: uppercase; letter-spacing: .5px; }
.table tbody tr:hover { background: #FAFBFC; }
.table-actions { white-space: nowrap; }

/* Badges */
.badge { display: inline-block; padding: 3px 8px; font-size: 11px; font-weight: 600; border-radius: 12px; text-transform: uppercase; letter-spacing: .5px; }
.badge-success { background: #DCFCE7; color: #166534; }
.badge-warn { background: #FEF3C7; color: #92400E; }
.badge-danger { background: #FEE2E2; color: #991B1B; }
.badge-info { background: #DBEAFE; color: #1E40AF; }
.badge-muted { background: #F3F4F6; color: #4B5563; }

/* Flash */
.flash { padding: 12px 16px; border-radius: 6px; margin-bottom: 14px; border-left: 4px solid; }
.flash-success { background: #DCFCE7; border-color: var(--success); color: #166534; }
.flash-error { background: #FEE2E2; border-color: var(--danger); color: #991B1B; }
.flash-warn { background: #FEF3C7; border-color: var(--warn); color: #92400E; }
.flash-info { background: #DBEAFE; border-color: var(--info); color: #1E40AF; }

/* Auth */
.auth-wrap {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--secondary) 0%, #1F1F1F 100%);
  padding: 20px;
}
.auth-card {
  background: #fff; border-radius: 12px; box-shadow: 0 20px 60px rgba(0,0,0,.3);
  max-width: 420px; width: 100%; overflow: hidden;
}
.auth-header {
  background: var(--brand); color: #fff; padding: 28px 28px 24px; text-align: center;
}
.auth-header img { height: 36px; margin-bottom: 8px; filter: brightness(0) invert(1); }
.auth-header h1 { margin: 6px 0 0; font-size: 20px; font-weight: 600; }
.auth-header .subtitle { font-size: 13px; opacity: .9; margin-top: 4px; }
.auth-body { padding: 28px; }
.auth-divider { text-align: center; margin: 18px 0; position: relative; color: var(--text-muted); font-size: 12px; }
.auth-divider::before, .auth-divider::after { content: ''; position: absolute; top: 50%; width: 40%; height: 1px; background: var(--border); }
.auth-divider::before { left: 0; }
.auth-divider::after { right: 0; }
.btn-google {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  background: #fff; color: #3c4043; border: 1px solid var(--border);
  padding: 10px; border-radius: 6px; font-weight: 500;
  width: 100%; text-decoration: none;
}
.btn-google:hover { background: #f8f9fa; text-decoration: none; }
.btn-google svg { width: 18px; height: 18px; }

/* Charts */
.chart-container { position: relative; height: 320px; margin: 12px 0; }

/* Utility */
.text-muted { color: var(--text-muted); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warn { color: var(--warn); }
.text-right { text-align: right; }
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.d-flex { display: flex; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }

/* Mobile */
@media (max-width: 900px) {
  .sidebar { width: 100%; position: relative; }
  .main { margin-left: 0; padding: 16px; }
}