:root {
  --bg-app: #f8fafc;
  --bg-sidebar: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --border-color: #e2e8f0;
  --border-focus: #2563eb;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-dim: #94a3b8;
  --accent-blue: #2563eb;
  --accent-cyan: #0284c7;
  --accent-emerald: #059669;
  --accent-amber: #d97706;
  --accent-rose: #e11d48;
  --sidebar-active: #f1f5f9;
  --sidebar-active-text: #0f172a;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-card: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

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

body {
  background-color: var(--bg-app);
  color: var(--text-main);
  font-family: var(--font-family);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
}

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

/* Sidebar */
.sidebar {
  width: 260px;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  flex-shrink: 0;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  z-index: 50;
}

.sidebar-header {
  padding: 24px 20px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: #0f172a;
}

.brand-badge-icon {
  width: 28px;
  height: 28px;
  background: #2563eb;
  color: #fff;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 0.9rem;
}

.sidebar-nav {
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.nav-group-title {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  text-transform: uppercase;
  padding: 0 10px;
  margin-bottom: 6px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
  border: 1px solid transparent;
}

.nav-item:hover {
  background: var(--bg-card-hover);
  color: var(--text-main);
}

.nav-item.active {
  background: var(--sidebar-active);
  color: var(--sidebar-active-text);
  font-weight: 600;
}

.nav-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  stroke: currentColor;
}

.sidebar-footer {
  padding: 16px 14px;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.lang-selector {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 6px 10px;
}

.user-profile-widget {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  background: var(--bg-card-hover);
}

.user-avatar-info {
  display: flex;
  align-items: center;
  gap: 10px;
  overflow: hidden;
}

.user-avatar-circle {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: #e0e7ff;
  color: #3730a3;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  flex-shrink: 0;
}

.user-name-text {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 120px;
}

.user-email-text {
  font-size: 0.75rem;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 120px;
}

.logout-icon-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
}

.logout-icon-btn:hover {
  color: var(--accent-rose);
}

/* Main Workspace */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.top-bar {
  background: #ffffff;
  border-bottom: 1px solid var(--border-color);
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 40;
}

.page-title-area h1 {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
}

.page-title-area p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.top-bar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.content-body {
  padding: 32px;
  flex: 1;
}

/* Views */
.tab-view {
  display: none;
  animation: fadeIn 0.15s ease-in-out;
}

.tab-view.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Cards & Grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
}

.card:hover {
  box-shadow: var(--shadow-card);
}

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

.card-title {
  font-size: 1.05rem;
  font-weight: 700;
}

/* Progress bar */
.progress-bar-bg {
  width: 100%;
  height: 8px;
  background: #e2e8f0;
  border-radius: 9999px;
  overflow: hidden;
  margin: 12px 0 8px;
}

.progress-bar-fill {
  height: 100%;
  border-radius: 9999px;
  background: #2563eb;
  transition: width 0.3s ease;
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.badge-blue { background: #dbeafe; color: #1d4ed8; }
.badge-emerald { background: #d1fae5; color: #047857; }
.badge-amber { background: #fef3c7; color: #b45309; }
.badge-rose { background: #ffe4e6; color: #be123c; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  border: 1px solid transparent;
}

.btn-primary { background: #2563eb; color: #ffffff; }
.btn-primary:hover { background: #1d4ed8; }
.btn-secondary { background: #ffffff; border-color: var(--border-color); color: var(--text-main); }
.btn-secondary:hover { background: #f8fafc; border-color: #cbd5e1; }
.btn-danger { background: #fee2e2; border-color: #fca5a5; color: #b91c1c; }
.btn-danger:hover { background: #ef4444; color: #ffffff; }
.btn-success { background: #d1fae5; border-color: #6ee7b7; color: #065f46; }
.btn-success:hover { background: #10b981; color: #ffffff; }
.btn-sm { padding: 6px 12px; font-size: 0.8rem; }

/* Form Controls */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.form-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.form-input, .form-select {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  padding: 10px 14px;
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s;
}

.form-input:focus, .form-select:focus {
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Playground / Console */
.playground-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.console-box {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.endpoint-tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.endpoint-tab {
  padding: 7px 12px;
  background: #f1f5f9;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}

.endpoint-tab:hover, .endpoint-tab.active {
  background: #2563eb;
  border-color: #2563eb;
  color: #ffffff;
}

.code-box {
  background: #0f172a;
  color: #f8fafc;
  border-radius: var(--radius-sm);
  padding: 14px;
  font-family: 'Fira Code', monospace;
  font-size: 0.85rem;
  white-space: pre-wrap;
  overflow-x: auto;
  margin-bottom: 16px;
}

.response-viewer {
  background: #0f172a;
  color: #e2e8f0;
  border-radius: var(--radius-sm);
  padding: 16px;
  font-family: 'Fira Code', monospace;
  font-size: 0.85rem;
  height: 380px;
  overflow-y: auto;
  white-space: pre-wrap;
}

/* Tables */
.table-container {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.85rem;
}

.nav-item.active {
  background: #f1f5f9;
  color: #0284c7;
  font-weight: 700;
}

.admin-nav-group .nav-group-title {
  color: #b45309;
}

.admin-nav-group .nav-item.active {
  background: #fef3c7;
  color: #92400e;
  font-weight: 700;
}

.data-table th {
  background: #f8fafc;
  color: var(--text-muted);
  font-weight: 600;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

.data-table tr:hover td {
  background: #f8fafc;
}

/* Modals */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.modal-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-dialog {
  background: #ffffff;
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 460px;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  overflow: hidden;
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 1.15rem;
  font-weight: 700;
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-size: 1.4rem;
  cursor: pointer;
}

.modal-body {
  padding: 24px;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  background: #f8fafc;
}

/* Toast */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  background: #0f172a;
  color: #ffffff;
  border-radius: var(--radius-sm);
  padding: 12px 18px;
  box-shadow: 0 10px 15px -3px rgba(0,0,0,0.2);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  font-weight: 500;
  animation: slideToast 0.2s ease;
}

@keyframes slideToast {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* Pagination Component */
.pagination-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  padding: 12px 16px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  flex-wrap: wrap;
  gap: 12px;
}

.pagination-info {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.pagination-controls {
  display: flex;
  align-items: center;
  gap: 6px;
}

.page-btn {
  background: #ffffff;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 6px 12px;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s;
  min-width: 34px;
  text-align: center;
}

.page-btn:hover:not(:disabled) {
  background: #f1f5f9;
  border-color: #cbd5e1;
}

.page-btn.active {
  background: var(--accent-blue);
  border-color: var(--accent-blue);
  color: #ffffff;
}

.page-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.page-ellipsis {
  padding: 0 4px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* =========================================================
   MOBILE: Slide-in Drawer Sidebar
   ========================================================= */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: 90;
  opacity: 0;
  transition: opacity 0.25s ease;
}
.sidebar-overlay.open {
  opacity: 1;
}

.mobile-menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s;
}
.mobile-menu-btn:hover {
  background: var(--bg-card-hover);
}
.mobile-menu-btn svg {
  width: 20px;
  height: 20px;
  stroke: var(--text-main);
  stroke-width: 2;
  fill: none;
}

@media (max-width: 900px) {
  .app-container {
    flex-direction: column;
  }

  /* Sidebar becomes a fixed slide-in drawer */
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: 280px;
    z-index: 100;
    transform: translateX(-100%);
    transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.12);
    border-right: 1px solid var(--border-color);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-overlay {
    display: block;
  }

  .main-content {
    width: 100%;
    min-width: 0;
  }

  /* Show the hamburger button in top-bar on mobile */
  .mobile-menu-btn {
    display: flex;
  }

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

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

  .top-bar {
    flex-wrap: wrap;
    gap: 12px;
  }
}