:root {
  --navy-900: #071A38;
  --navy-800: #0C2359;
  --navy-700: #153D70;
  --cyan-500: #0AC4B8;
  --cyan-600: #08BDBB;
  --ocean-500: #0466AA;
  --bg-page: #F8FAFC;
  --bg-card: #FFFFFF;
  --border-color: #E2E8F0;
  --text-main: #1E293B;
  --text-muted: #67798F;
  --status-success: #10B981;
  --status-warning: #F59E0B;
  --status-error: #EF4444;
  --status-info: #3B82F6;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05), 0 1px 2px rgba(0,0,0,0.03);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -1px rgba(0,0,0,0.04);
}

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

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

/* Header & Navigation */
header.topbar {
  background: #FFFFFF;
  border-bottom: 1px solid var(--border-color);
  padding: 0 2rem;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
}

.brand-logo-img {
  height: 38px;
  width: auto;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.lang-selector {
  padding: 6px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: #FFF;
  color: var(--text-main);
  font-size: 0.875rem;
  cursor: pointer;
  outline: none;
}

.user-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--navy-900);
  background: #F1F5F9;
  padding: 6px 14px;
  border-radius: 20px;
}

/* Layout */
.app-container {
  display: flex;
  flex: 1;
  max-width: 1440px;
  width: 100%;
  margin: 0 auto;
}

/* Sidebar */
aside.sidebar {
  width: 260px;
  background: #FFFFFF;
  border-right: 1px solid var(--border-color);
  padding: 1.5rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.925rem;
  font-weight: 500;
  transition: all 0.15s ease;
  cursor: pointer;
}

.nav-item:hover {
  background: #F1F5F9;
  color: var(--navy-900);
}

.nav-item.active {
  background: #EEF6FF;
  color: var(--ocean-500);
  font-weight: 600;
}

.nav-item svg {
  width: 20px;
  height: 20px;
  stroke-width: 2;
}

.nav-divider {
  height: 1px;
  background: var(--border-color);
  margin: 12px 0;
}

/* Main Content Area */
main.main-content {
  flex: 1;
  padding: 2rem;
  overflow-y: auto;
}

.page-header {
  margin-bottom: 2rem;
}

.page-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--navy-900);
  margin-bottom: 4px;
}

.page-subtitle {
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* Cards & Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.card-title {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.card-value {
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--navy-900);
}

.card-meta {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.badge-active { background: #ECFDF5; color: var(--status-success); }
.badge-trial { background: #EFF6FF; color: var(--status-info); }
.badge-expired { background: #FEF2F2; color: var(--status-error); }
.badge-suspended { background: #FFFBEB; color: var(--status-warning); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.925rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  text-decoration: none;
}

.btn-primary {
  background: var(--navy-900);
  color: #FFFFFF;
}

.btn-primary:hover {
  background: var(--navy-800);
}

.btn-accent {
  background: var(--cyan-500);
  color: #042C2B;
}

.btn-accent:hover {
  background: var(--cyan-600);
}

.btn-outline {
  background: #FFFFFF;
  border-color: var(--border-color);
  color: var(--text-main);
}

.btn-outline:hover {
  background: #F8FAFC;
  border-color: #CBD5E1;
}

.btn-danger {
  background: #FEF2F2;
  border-color: #FECACA;
  color: var(--status-error);
}

.btn-danger:hover {
  background: #FEE2E2;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.825rem;
}

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

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

table.data-table th {
  background: #F8FAFC;
  padding: 12px 16px;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
}

table.data-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-main);
}

table.data-table tr:hover td {
  background: #F8FAFC;
}

/* Code & Keys */
.code-box {
  background: #F1F5F9;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: 0.875rem;
  color: var(--navy-900);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

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

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--navy-900);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.925rem;
  color: var(--text-main);
  outline: none;
  transition: border-color 0.15s;
}

.form-control:focus {
  border-color: var(--ocean-500);
  box-shadow: 0 0 0 3px rgba(4, 102, 170, 0.12);
}

/* Modals & Auth Overlay */
.auth-overlay {
  position: fixed;
  inset: 0;
  background: rgba(7, 26, 56, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.auth-modal {
  background: #FFFFFF;
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 440px;
  padding: 2.5rem;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.auth-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
}

.auth-tab {
  flex: 1;
  text-align: center;
  padding: 10px;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
}

.auth-tab.active {
  color: var(--navy-900);
  border-bottom-color: var(--navy-900);
}

/* Alerts */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 1.25rem;
  font-size: 0.875rem;
}

.alert-error {
  background: #FEF2F2;
  color: #991B1B;
  border: 1px solid #FECACA;
}

.alert-success {
  background: #ECFDF5;
  color: #065F46;
  border: 1px solid #A7F3D0;
}

.alert-info {
  background: #EFF6FF;
  color: #1E40AF;
  border: 1px solid #BFDBFE;
}

/* Responsive */
@media (max-width: 860px) {
  aside.sidebar {
    width: 72px;
    padding: 1rem 0.5rem;
  }
  .nav-item span {
    display: none;
  }
  .brand-logo-img {
    height: 30px;
  }
}