:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --success: #16a34a;
  --success-hover: #15803d;
  --danger: #dc2626;
  --danger-hover: #b91c1c;
  --warning: #d97706;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --text: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --radius: 10px;
  --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  background-color: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

nav a {
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  transition: background 0.15s;
}

nav a:hover {
  background-color: var(--bg);
  color: var(--primary);
}

.btn-nav-logout {
  color: var(--danger);
}

main {
  flex: 1;
  max-width: 1000px;
  width: 100%;
  margin: 2rem auto;
  padding: 0 1rem;
}

.auth-container {
  max-width: 420px;
  margin: 3rem auto;
}

.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 1.75rem;
  margin-bottom: 1.5rem;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.form-group {
  margin-bottom: 1.25rem;
}

label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0.4rem;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="time"],
select,
textarea {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.95rem;
  background-color: #fff;
  transition: border-color 0.15s, box-shadow 0.15s;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: background 0.15s, transform 0.05s;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background-color: var(--primary);
  color: white;
}
.btn-primary:hover {
  background-color: var(--primary-hover);
}

.btn-success {
  background-color: var(--success);
  color: white;
}
.btn-success:hover {
  background-color: var(--success-hover);
}

.btn-danger {
  background-color: var(--danger);
  color: white;
}
.btn-danger:hover {
  background-color: var(--danger-hover);
}

.btn-warning {
  background-color: var(--warning);
  color: white;
}

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
}

.btn-block {
  width: 100%;
}

.alert {
  padding: 0.85rem 1rem;
  border-radius: 6px;
  margin-bottom: 1.25rem;
  font-size: 0.9rem;
}

.alert-danger {
  background-color: #fef2f2;
  border: 1px solid #fecaca;
  color: #991b1b;
}

.alert-success {
  background-color: #f0fdf4;
  border: 1px solid #bbf7d0;
  color: #166534;
}

.alert-info {
  background-color: #eff6ff;
  border: 1px solid #bfdbfe;
  color: #1e40af;
}

.alert-warning {
  background-color: #fffbeb;
  border: 1px solid #fde68a;
  color: #92400e;
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.6rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.badge-pending {
  background-color: #fef3c7;
  color: #92400e;
}

.badge-active {
  background-color: #dcfce7;
  color: #166534;
}

.badge-disabled {
  background-color: #f1f5f9;
  color: #475569;
}

.badge-rejected {
  background-color: #fee2e2;
  color: #991b1b;
}

.table-responsive {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

th, td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
}

th {
  background-color: #f8fafc;
  font-weight: 600;
  color: var(--text-muted);
}

.actions-group {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.text-muted {
  color: var(--text-muted);
}

.text-center {
  text-align: center;
}

.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mb-3 { margin-bottom: 1rem; }

@media (max-width: 640px) {
  header {
    flex-direction: column;
    gap: 0.75rem;
    align-items: flex-start;
  }
  nav {
    width: 100%;
    justify-content: space-between;
  }
}