:root {
  --brand: #0d9488;
  --brand-dark: #0f766e;
  --ink: #1f2937;
  --muted: #6b7280;
  --bg: #f4f6f8;
  --card: #ffffff;
  --border: #e5e7eb;
  --danger: #dc2626;
  --warn: #d97706;
  --ok: #16a34a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 14px;
}

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

.app-shell {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 220px;
  background: #ffffff;
  border-right: 1px solid var(--border);
  padding: 20px 0;
  flex-shrink: 0;
}

.sidebar .brand {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 20px 20px;
  font-weight: 700;
  color: var(--brand-dark);
  font-size: 16px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 12px;
}

.sidebar nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  color: var(--ink);
  font-weight: 500;
}

.sidebar nav a .nav-icon {
  flex: 0 0 auto;
  width: 18px;
  text-align: center;
  font-size: 15px;
  line-height: 1;
}

.sidebar nav a:hover { background: #f0fdfa; text-decoration: none; }
.sidebar nav a.active { background: #ccfbf1; color: var(--brand-dark); border-right: 3px solid var(--brand); }

.sidebar .section-label {
  padding: 16px 20px 4px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
}

.main {
  flex: 1;
  min-width: 0;
}

.topbar {
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.topbar .user-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--muted);
}

.topbar-search {
  flex: 1;
  max-width: 320px;
  margin: 0 16px;
}

.topbar-search input {
  width: 100%;
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
}

.content { padding: 24px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.card-header h2, .card-header h3 { margin: 0; }

h1 { font-size: 22px; margin: 0 0 16px; }
h2 { font-size: 18px; }
h3 { font-size: 15px; }

.grid {
  display: grid;
  gap: 16px;
}

.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

@media (max-width: 900px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .app-shell { flex-direction: column; }
  .sidebar { width: 100%; }
}

.stat-tile {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
}

.stat-tile .label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
.stat-tile .value { font-size: 26px; font-weight: 700; margin-top: 6px; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}

th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }

tr:hover td { background: #fafafa; }

.btn {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 6px;
  border: 1px solid var(--brand);
  background: var(--brand);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  font-size: 13.5px;
}

.btn:hover { background: var(--brand-dark); text-decoration: none; }

.btn-secondary { background: #fff; color: var(--ink); border-color: var(--border); }
.btn-secondary:hover { background: #f4f6f8; }

.btn-danger { background: var(--danger); border-color: var(--danger); }
.btn-danger:hover { background: #b91c1c; }

.btn-sm { padding: 4px 10px; font-size: 12.5px; }

.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 5px; font-size: 13px; }

input[type=text], input[type=email], input[type=password], input[type=date],
input[type=time], input[type=number], input[type=tel], select, textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  background: #fff;
  color: var(--ink);
}

textarea { resize: vertical; min-height: 90px; }

.form-row { display: flex; gap: 14px; }
.form-row .form-group { flex: 1; }

.badge {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 600;
}

.badge-ok { background: #dcfce7; color: #166534; }
.badge-warn { background: #fef3c7; color: #92400e; }
.badge-danger { background: #fee2e2; color: #991b1b; }
.badge-muted { background: #f1f5f9; color: #475569; }

.flash { padding: 12px 16px; border-radius: 6px; margin-bottom: 16px; font-size: 13.5px; }
.flash-success { background: #dcfce7; color: #166534; }
.flash-error { background: #fee2e2; color: #991b1b; }
.flash-warning { background: #fef9c3; color: #854d0e; }

.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #0d9488, #0f766e);
}

.login-card {
  background: #fff;
  padding: 36px;
  border-radius: 10px;
  width: 100%;
  max-width: 380px;
  box-shadow: 0 20px 40px rgba(0,0,0,.15);
}

.login-card h1 { text-align: center; color: var(--brand-dark); }
.text-muted { color: var(--muted); }
.text-right { text-align: right; }
.mt-0 { margin-top: 0; }
.actions-inline { display: flex; gap: 8px; }
.empty-state { text-align: center; padding: 40px 20px; color: var(--muted); }