:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --success: #10b981;
  --success-dark: #059669;
  --danger: #ef4444;
  --danger-dark: #dc2626;
  --warning: #f59e0b;
  --info: #06b6d4;
  --dark: #0f172a;
  --gray-900: #1e293b;
  --gray-800: #334155;
  --gray-700: #475569;
  --gray-600: #64748b;
  --gray-400: #94a3b8;
  --gray-300: #cbd5e1;
  --gray-200: #e2e8f0;
  --gray-100: #f1f5f9;
  --gray-50: #f8fafc;
  --white: #ffffff;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--gray-50);
  color: var(--gray-800);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--gray-900);
  font-weight: 700;
  line-height: 1.25;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: all 0.2s;
}

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

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

.sidebar {
  width: 260px;
  background: var(--white);
  border-right: 1px solid var(--gray-200);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 40;
}

.sidebar-header {
  padding: 1.5rem 1.25rem;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.sidebar-logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sidebar-menu {
  padding: 1rem 0.75rem;
  list-style: none;
  flex: 1;
  overflow-y: auto;
}

.sidebar-menu li {
  margin-bottom: 0.25rem;
}

.sidebar-menu a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  color: var(--gray-700);
  border-radius: var(--radius-md);
  font-weight: 500;
}

.sidebar-menu a:hover {
  background-color: var(--primary-light);
  color: var(--primary);
}

.sidebar-menu a.active {
  background-color: var(--primary);
  color: var(--white);
}

/* Sidebar Kategoriyalar */
.sidebar-category {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.7rem 1rem;
  color: var(--gray-600);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  cursor: pointer;
  border-radius: var(--radius-md);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: background 0.15s;
  margin-top: 0.5rem;
}
.sidebar-category:first-child { margin-top: 0; }
.sidebar-category:hover { background: var(--gray-100); }
.sidebar-category .chevron {
  font-size: 0.65rem;
  transition: transform 0.25s ease;
  color: var(--gray-400);
}
.sidebar-category.open .chevron {
  transform: rotate(90deg);
  color: var(--primary);
}
.sidebar-submenu {
  list-style: none;
  padding: 0.25rem 0 0.5rem 0;
  margin: 0;
  display: none !important;
}
.sidebar-submenu.open {
  display: block !important;
}
.sidebar-submenu li { margin-bottom: 0.1rem; }
.sidebar-submenu a {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 1rem 0.6rem 1.5rem;
  color: var(--gray-700);
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 0.88rem;
  min-height: 40px;
  transition: background 0.15s, color 0.15s;
}
.sidebar-submenu a:hover {
  background-color: var(--primary-light);
  color: var(--primary);
}
.sidebar-submenu a.active {
  background-color: var(--primary);
  color: var(--white);
}
.sidebar-direct {
  margin-bottom: 0.25rem;
}
.sidebar-direct a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  color: var(--gray-700);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.92rem;
  min-height: 44px;
}
.sidebar-direct a:hover { background-color: var(--primary-light); color: var(--primary); }
.sidebar-direct a.active { background-color: var(--primary); color: var(--white); }

.main-content {
  flex: 1;
  margin-left: 260px;
  padding: 2rem;
  min-width: 0;
}

@media (max-width: 900px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main-content {
    margin-left: 0;
    padding: 1rem;
  }
}

/* Top Navbar */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  background: var(--white);
  padding: 1rem 1.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

/* Cards & Containers */
.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--gray-100);
}

.card-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--gray-900);
}

/* Grid & Dashboard Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.stat-icon.blue { background: #dbeafe; color: #1d4ed8; }
.stat-icon.green { background: #d1fae5; color: #047857; }
.stat-icon.yellow { background: #fef3c7; color: #b45309; }
.stat-icon.purple { background: #f3e8ff; color: #7e22ce; }

.stat-value {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--gray-900);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--gray-600);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

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

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

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

.btn-outline {
  background: transparent;
  border-color: var(--gray-300);
  color: var(--gray-700);
}
.btn-outline:hover {
  background: var(--gray-100);
  border-color: var(--gray-400);
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 0.875rem 1.75rem;
  font-size: 1.1rem;
}

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

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--gray-800);
  font-size: 0.925rem;
}

.form-control {
  width: 100%;
  padding: 0.625rem 0.875rem;
  font-size: 0.95rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-md);
  background: var(--white);
  color: var(--gray-900);
  transition: border-color 0.2s, box-shadow 0.2s;
}

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

textarea.form-control {
  min-height: 90px;
  resize: vertical;
}

/* Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
}

.table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.table th {
  background: var(--gray-50);
  padding: 0.75rem 1rem;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--gray-600);
  border-bottom: 1px solid var(--gray-200);
}

.table td {
  padding: 1rem;
  border-bottom: 1px solid var(--gray-200);
  font-size: 0.925rem;
  vertical-align: middle;
}

.table tbody tr:hover {
  background: var(--gray-50);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.625rem;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 9999px;
  text-transform: uppercase;
}

.badge-success { background: #dcfce7; color: #15803d; }
.badge-danger { background: #fee2e2; color: #b91c1c; }
.badge-warning { background: #fef3c7; color: #b45309; }
.badge-info { background: #e0f2fe; color: #0369a1; }
.badge-secondary { background: #f1f5f9; color: #475569; }

/* Alerts */
.alert {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.alert-success { background: #dcfce7; border: 1px solid #86efac; color: #166534; }
.alert-danger { background: #fee2e2; border: 1px solid #fca5a5; color: #991b1b; }
.alert-warning { background: #fef3c7; border: 1px solid #fde047; color: #854d0e; }
.alert-info { background: #e0f2fe; border: 1px solid #7dd3fc; color: #075985; }

/* Login Page Layout */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 50%, #e0e7ff 100%);
  padding: 1.5rem;
}

.auth-card {
  width: 100%;
  max-width: 440px;
  background: var(--white);
  padding: 2.5rem 2rem;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid rgba(255, 255, 255, 0.7);
}

.auth-header {
  text-align: center;
  margin-bottom: 2rem;
}

.auth-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  background: transparent;
  border-radius: 50%;
  margin-bottom: 1rem;
}

.auth-logo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* ========================================================
   MIRZAYEVA EDUCATION PRELOADER & SPLASH SCREEN
   ======================================================== */
.app-preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: radial-gradient(circle at 50% 40%, #161c28 0%, #070a10 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999999;
  transition: opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1), visibility 0.5s ease;
}

.app-preloader.fade-out {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.preloader-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 1.5rem;
}

.preloader-logo-wrapper {
  position: relative;
  width: 140px;
  height: 140px;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.preloader-logo {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 50%;
  animation: preloaderPulse 2.4s infinite ease-in-out;
  filter: drop-shadow(0 0 25px rgba(217, 119, 6, 0.4));
}

.preloader-glow {
  position: absolute;
  width: 170px;
  height: 170px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(234, 179, 8, 0.2) 0%, transparent 70%);
  pointer-events: none;
  animation: glowBreathing 2.4s infinite alternate ease-in-out;
}

.preloader-title {
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
  background: linear-gradient(135deg, #fef08a 0%, #f59e0b 50%, #d97706 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-family: 'Inter', -apple-system, sans-serif;
}

.preloader-progress-track {
  width: 240px;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 9999px;
  overflow: hidden;
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.5);
}

.preloader-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #d97706 0%, #fbbf24 50%, #fef08a 100%);
  border-radius: 9999px;
  transition: width 0.08s linear;
  box-shadow: 0 0 14px rgba(251, 191, 36, 0.8);
}

.preloader-text {
  font-size: 0.8rem;
  color: #94a3b8;
  font-weight: 600;
  margin-top: 0.75rem;
  letter-spacing: 0.05em;
  font-family: 'Courier New', Courier, monospace;
}

@keyframes preloaderPulse {
  0%, 100% {
    transform: scale(1);
    filter: drop-shadow(0 0 20px rgba(217, 119, 6, 0.35));
  }
  50% {
    transform: scale(1.04);
    filter: drop-shadow(0 0 32px rgba(234, 179, 8, 0.6));
  }
}

@keyframes glowBreathing {
  0% {
    transform: scale(0.9);
    opacity: 0.4;
  }
  100% {
    transform: scale(1.2);
    opacity: 0.9;
  }
}