/* GasVault Portal Styles */
:root {
  --primary: #0056b3;
  --primary-dark: #004494;
  --success: #28a745;
  --danger: #dc3545;
  --warning: #ffc107;
  --info: #17a2b8;
  --light: #f8f9fa;
  --dark: #333;
  --gray: #6c757d;
  --border: #dee2e6;
}

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

html, body {
  overflow-x: hidden;
  max-width: 100vw;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--light);
  color: var(--dark);
  line-height: 1.6;
}

/* Login Page */
.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: linear-gradient(135deg, #0056b3 0%, #004494 100%);
}

.login-box {
  background: white;
  padding: 40px;
  border-radius: 16px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.2);
  width: 100%;
  max-width: 400px;
}

.login-logo {
  text-align: center;
  margin-bottom: 30px;
}

.login-logo img {
  width: 80px;
  height: 80px;
  margin-bottom: 10px;
}

.login-logo h1 {
  font-size: 28px;
  color: var(--primary);
  margin-bottom: 5px;
}

.login-logo p {
  color: var(--gray);
  font-size: 14px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--dark);
}

.form-group input {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid var(--border);
  border-radius: 10px;
  font-size: 16px;
  transition: border-color 0.2s;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  border: none;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

.btn-primary {
  background: var(--primary);
  color: white;
  width: 100%;
}

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

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-secondary {
  background: var(--light);
  color: var(--dark);
  border: 2px solid var(--border);
}

.btn-secondary:hover {
  background: var(--border);
}

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

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

.error-msg {
  background: #fee;
  color: var(--danger);
  padding: 12px;
  border-radius: 8px;
  margin-bottom: 20px;
  font-size: 14px;
  display: none;
}

.error-msg.show {
  display: block;
}

/* Dashboard Layout */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 260px;
  background: var(--dark);
  color: white;
  padding: 20px 0;
  position: fixed;
  height: 100vh;
  overflow-y: auto;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 20px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: 20px;
}

.sidebar-logo img {
  width: 40px;
  height: 40px;
  border-radius: 8px;
}

.sidebar-logo span {
  font-size: 20px;
  font-weight: 700;
}

.sidebar-nav {
  list-style: none;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  transition: all 0.2s;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
  background: rgba(255,255,255,0.1);
  color: white;
}

.sidebar-nav a.active {
  border-left: 3px solid var(--primary);
}

.sidebar-nav .icon {
  font-size: 18px;
  width: 24px;
  text-align: center;
}

.sidebar-user {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 15px 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
  background: rgba(0,0,0,0.2);
}

.sidebar-user .user-name {
  font-weight: 600;
  margin-bottom: 2px;
}

.sidebar-user .user-email {
  font-size: 12px;
  color: rgba(255,255,255,0.5);
}

.logout-btn {
  margin-top: 10px;
  padding: 8px 12px;
  font-size: 13px;
  background: rgba(255,255,255,0.1);
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  width: 100%;
}

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

/* Main Content */
.main-content {
  flex: 1;
  margin-left: 260px;
  padding: 30px;
}

.page-header {
  margin-bottom: 30px;
}

.page-header h1 {
  font-size: 28px;
  color: var(--dark);
  margin-bottom: 5px;
}

.page-header p {
  color: var(--gray);
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.stat-card {
  background: white;
  padding: 24px;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.stat-card .stat-icon {
  font-size: 24px;
  margin-bottom: 10px;
}

.stat-card .stat-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--dark);
}

.stat-card .stat-label {
  font-size: 14px;
  color: var(--gray);
  margin-top: 4px;
}

.stat-card .stat-sub {
  font-size: 13px;
  color: var(--success);
  margin-top: 8px;
}

.stat-card.danger .stat-value { color: var(--danger); }
.stat-card.success .stat-value { color: var(--success); }
.stat-card.warning .stat-value { color: var(--warning); }
.stat-card.info .stat-value { color: var(--info); }

/* Cards */
.card {
  background: white;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  margin-bottom: 20px;
}

.card-header {
  padding: 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-header h2 {
  font-size: 18px;
  color: var(--dark);
}

.card-body {
  padding: 20px;
}

/* Tables */
.table-responsive {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

table th,
table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

table th {
  background: var(--light);
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  color: var(--gray);
}

table tr:hover {
  background: #f8f9fa;
}

table .badge {
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.badge-success { background: #d4edda; color: #155724; }
.badge-warning { background: #fff3cd; color: #856404; }
.badge-danger { background: #f8d7da; color: #721c24; }
.badge-info { background: #d1ecf1; color: #0c5460; }

/* Search & Filters */
.search-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
}

.search-bar input {
  flex: 1;
  padding: 12px 16px;
  border: 2px solid var(--border);
  border-radius: 10px;
  font-size: 15px;
}

.search-bar input:focus {
  outline: none;
  border-color: var(--primary);
}

/* Loading Spinner */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--gray);
}

.empty-state .icon {
  font-size: 48px;
  margin-bottom: 15px;
  opacity: 0.5;
}

.empty-state h3 {
  margin-bottom: 8px;
  color: var(--dark);
}

/* Responsive */
@media (max-width: 768px) {
  .sidebar {
    width: 100%;
    height: auto;
    position: relative;
  }

  .main-content {
    margin-left: 0;
  }

  .app-container {
    flex-direction: column;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .login-box {
    padding: 30px 20px;
  }
}