* {
  box-sizing: border-box;
}

:root {
  --bg-primary: #0b1220;
  --bg-secondary: #0e1730;
  --bg-tertiary: #121a2b;
  --text-primary: #e8eefc;
  --text-secondary: #a7b3cf;
  --border-color: #1d2740;
  --accent-color: #6db3ff;
  --accent-hover: #5a9de6;
  --success-bg: #0f2a1a;
  --success-border: #1f6a3d;
  --danger-bg: #2a1110;
  --danger-border: #7a2a1f;
}

[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #ffffff;
  --text-primary: #000000;
  --text-secondary: #666666;
  --border-color: #dee2e6;
  --accent-color: #0d6efd;
  --accent-hover: #0b5ed7;
  --success-bg: #d1e7dd;
  --success-border: #badbcc;
  --danger-bg: #f8d7da;
  --danger-border: #f1aeb5;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial;
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: background-color 0.3s ease, color 0.3s ease;
}

a {
  color: var(--accent-color);
  text-decoration: none;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px;
}

header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  padding: 12px 16px;
}

.brand {
  font-weight: 700;
}

.form {
  display: grid;
  gap: 10px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 16px;
}

.grid2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
}

.card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 16px;
  overflow: visible !important;
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.card-title {
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.btn {
  background: var(--accent-color);
  color: #00102a;
  padding: 10px 14px;
  border-radius: 10px;
  display: inline-block;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.btn:hover {
  background: var(--accent-hover);
  color: #00102a;
}

.btn.sm {
  padding: 6px 10px;
  font-size: 14px;
}

.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
}

.table th,
.table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border-color);
  font-size: 14px;
  color: var(--text-primary);
}

.table th {
  background: var(--bg-secondary);
  font-weight: 600;
}

.flash {
  padding: 10px;
  border-radius: 10px;
  margin: 6px 0;
  transition: all 0.3s ease;
}

.flash.success {
  background: var(--success-bg);
  border: 1px solid var(--success-border);
  color: var(--text-primary);
}

.flash.danger {
  background: var(--danger-bg);
  border: 1px solid var(--danger-border);
  color: var(--text-primary);
}

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

/* Στυλ για form elements */
.form-select,
.form-control {
  background-color: var(--bg-tertiary) !important;
  color: var(--text-primary) !important;
  border-color: var(--border-color) !important;
  transition: all 0.3s ease;
}
.brand-logo-img {
    width: 46px;
    height: 46px;
    border-radius: 10px;
    object-fit: cover;
    border: 1px solid var(--border-color);
    background: #fff;
    padding: 2px;
}

.form-select:focus,
.form-control:focus {
  border-color: var(--accent-color) !important;
  box-shadow: 0 0 0 0.25rem rgba(109, 179, 255, 0.25) !important;
  background-color: var(--bg-tertiary) !important;
  color: var(--text-primary) !important;
}

.form-select option {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

/* Theme switcher styles */
.theme-switcher .dropdown-menu {
  background-color: var(--bg-tertiary);
  border-color: var(--border-color);
}

.theme-switcher .dropdown-item {
  color: var(--text-primary);
  transition: background-color 0.3s ease;
}

.theme-switcher .dropdown-item:hover,
.theme-switcher .dropdown-item:focus {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

.theme-switcher .dropdown-item.active {
  background-color: var(--accent-color);
  color: white;
}

.btn-outline-secondary {
  color: var(--text-primary);
  border-color: var(--border-color);
  background-color: transparent;
}

.btn-outline-secondary:hover {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border-color: var(--border-color);
}

/* User info section */
.user-info {
  background: var(--bg-secondary);
  padding: 10px 15px;
  border-radius: 4px;
  margin-bottom: 20px;
  border-left: 4px solid var(--accent-color);
  color: var(--text-primary);
}

.user-info strong {
  color: var(--text-primary);
}

/* Header actions */
.header-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 10px;
}

.btn-group {
  display: flex;
  gap: 10px;
  align-items: center;
}

.account-btn {
  background: #28a745;
  color: white;
  padding: 8px 16px;
  text-decoration: none;
  border-radius: 4px;
  font-weight: 500;
  transition: background 0.3s;
}

.account-btn:hover {
  background: #218838;
  color: white;
  text-decoration: none;
}

.logout-btn {
  background: #dc3545;
  color: white;
  padding: 8px 16px;
  text-decoration: none;
  border-radius: 4px;
  font-weight: 500;
  transition: background 0.3s;
}

.logout-btn:hover {
  background: #c82333;
  color: white;
  text-decoration: none;
}

/* Responsive design */
@media (max-width: 768px) {
  .header-actions {
    flex-direction: column;
    align-items: flex-start;
  }
  .btn-group {
    width: 100%;
    justify-content: flex-start;
    margin-top: 10px;
  }
  .grid2 {
    grid-template-columns: 1fr;
  }
  .cards {
    grid-template-columns: 1fr;
  }
}
/* Ενιαίο κουμπί εξόδου στο navbar */
.navbar .logout-navbar-btn {
    background-color: #f8f9fa !important;
    color: #000 !important;
    border-color: #f8f9fa !important;
}

.navbar .logout-navbar-btn:hover {
    background-color: #e2e6ea !important;
    color: #000 !important;
}