:root {
  --primary: #1e3a8a; /* Deep blue */
  --primary-light: #3b82f6;
  --secondary: #6366f1; /* Indigo */
  --success: #10b981;
  --danger: #ef4444;
  --warning: #f59e0b;
  --bg-color: #f3f4f6;
  --surface: #ffffff;
  --text-main: #111827;
  --text-muted: #6b7280;
  --border-color: #e5e7eb;
  --sidebar-width: 260px;
  --header-height: 70px;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.5;
  overflow-x: hidden;
}

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

.sidebar {
  width: var(--sidebar-width);
  background: var(--primary);
  color: white;
  position: fixed;
  height: 100vh;
  left: 0;
  top: 0;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
  z-index: 100;
  box-shadow: 4px 0 10px rgba(0,0,0,0.1);
}

.sidebar-header {
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(0,0,0,0.1);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.sidebar-header h1 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.logo-icon {
  font-size: 1.5rem;
  background: rgba(255,255,255,0.2);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
}

.nav-menu {
  list-style: none;
  padding: 20px 0;
  flex: 1;
}

.nav-item {
  margin-bottom: 8px;
  padding: 0 16px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
  font-weight: 500;
}

.nav-link:hover {
  background: rgba(255,255,255,0.1);
  color: white;
  transform: translateX(5px);
}

.nav-link.active {
  background: var(--primary-light);
  color: white;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

.nav-icon {
  font-size: 1.2rem;
}

.sidebar-footer {
  padding: 20px;
  text-align: center;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
  border-top: 1px solid rgba(255,255,255,0.05);
}

.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.top-header {
  height: var(--header-height);
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 90;
}

.hamburger-btn {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-main);
}

.header-title h2 {
  font-size: 1.25rem;
  font-weight: 600;
}

.admin-profile {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 30px;
  background: var(--bg-color);
  cursor: pointer;
  transition: var(--transition);
}

.admin-profile:hover {
  background: var(--border-color);
}

.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.content-wrapper {
  padding: 24px;
  flex: 1;
}

/* Tab contents */
.fade-in {
  animation: fadeIn 0.4s ease-out forwards;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

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

.stat-card {
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  color: white;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.gradient-primary { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); }
.gradient-secondary { background: linear-gradient(135deg, #4f46e5 0%, #818cf8 100%); }
.gradient-success { background: linear-gradient(135deg, #059669 0%, #34d399 100%); }

.stat-icon {
  font-size: 2.5rem;
  background: rgba(255,255,255,0.2);
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.stat-info h3 {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.2;
}

.stat-info p {
  font-size: 0.9rem;
  opacity: 0.9;
  font-weight: 500;
}

.welcome-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  border-left: 5px solid var(--primary);
}

.welcome-card h2 {
  color: var(--primary);
  margin-bottom: 12px;
}

/* General Cards & Tables */
.card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  margin-bottom: 24px;
  overflow: hidden;
}

.card-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
  background: rgba(249, 250, 251, 0.5);
}

.flex-between {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.header-filters {
  display: flex;
  gap: 12px;
  align-items: center;
}

.card-body {
  padding: 24px;
}

.table-responsive {
  overflow-x: auto;
}

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

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

.data-table th {
  background: #f8fafc;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

.data-table tbody tr {
  transition: var(--transition);
}

.data-table tbody tr:hover {
  background: #f1f5f9;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  gap: 8px;
}

.btn:active {
  transform: scale(0.95);
}

.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 4px 6px rgba(30, 58, 138, 0.2);
}

.btn-primary:hover {
  background: #172554;
  box-shadow: 0 6px 12px rgba(30, 58, 138, 0.3);
}

.btn-secondary {
  background: #e2e8f0;
  color: #475569;
}

.btn-secondary:hover {
  background: #cbd5e1;
}

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

.btn-danger:hover {
  background: #b91c1c;
}

.btn-action {
  padding: 6px 12px;
  font-size: 0.8rem;
  border-radius: 4px;
}

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

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--text-main);
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.95rem;
  transition: var(--transition);
  background: #fff;
  outline: none;
}

.form-control:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-text {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 6px;
  display: block;
}

/* Modals */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(17, 24, 39, 0.7);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.modal.show {
  display: flex;
  opacity: 1;
}

.modal-content {
  background: var(--surface);
  width: 90%;
  max-width: 500px;
  border-radius: var(--radius-lg);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  transform: translateY(-20px) scale(0.95);
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal.show .modal-content {
  transform: translateY(0) scale(1);
}

.glass-effect {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

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

.modal-header h3 {
  font-size: 1.25rem;
  color: var(--primary);
}

.close-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.2s;
}

.close-btn:hover {
  color: var(--danger);
}

.modal-body {
  padding: 24px;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

/* Toasts */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.toast {
  background: var(--surface);
  color: var(--text-main);
  padding: 16px 24px;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  display: flex;
  align-items: center;
  gap: 12px;
  border-left: 4px solid var(--primary);
  min-width: 300px;
  animation: slideInRight 0.3s ease-out forwards;
}

.toast.success { border-left-color: var(--success); }
.toast.error { border-left-color: var(--danger); }
.toast.warning { border-left-color: var(--warning); }

.toast-closing {
  animation: fadeOutDown 0.3s ease-in forwards;
}

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

@keyframes fadeOutDown {
  to { transform: translateY(100%); opacity: 0; }
}

/* Responsive */
.sidebar-overlay {
  opacity: 0;
  visibility: hidden;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 95;
  backdrop-filter: blur(2px);
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }
  
  .sidebar.active {
    transform: translateX(0);
    box-shadow: 4px 0 25px rgba(0,0,0,0.3);
  }
  
  .main-content {
    margin-left: 0;
  }
  
  .hamburger-btn {
    display: block;
  }
  
  .sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
  }
  
  .flex-between {
    flex-direction: column;
    align-items: stretch;
  }
  
  .header-filters {
    flex-direction: column;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   Sección de Login (Glassmorphism & Rich Aesthetics)
   ========================================================================== */
.login-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: radial-gradient(circle at 10% 20%, rgb(4, 21, 66) 0%, rgb(12, 36, 96) 90%);
  padding: 20px;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2000;
  box-sizing: border-box;
  overflow-y: auto;
}

.login-card {
  width: 100%;
  max-width: 420px;
  padding: 40px;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
  background: rgba(255, 255, 255, 0.08) !important;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.15) !important;
  color: white;
  animation: cardEntrance 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes cardEntrance {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

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

.login-header h2 {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-top: 15px;
  margin-bottom: 5px;
  background: linear-gradient(135deg, #fff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.login-header p {
  color: #94a3b8;
  font-size: 0.95rem;
}

.login-logo {
  font-size: 3rem;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 70px;
  height: 70px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.3);
  animation: float 4s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.login-card .form-group label {
  color: #e2e8f0;
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.login-card .form-control {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: white;
  padding: 12px 16px;
  font-size: 1rem;
}

.login-card .form-control::placeholder {
  color: rgba(255, 255, 255, 0.35);
}

.login-card .form-control:focus {
  background: rgba(255, 255, 255, 0.1);
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
}

.login-error-msg {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: var(--radius-md);
  padding: 12px;
  margin-bottom: 20px;
  font-size: 0.9rem;
  color: #fca5a5;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: shake 0.4s ease-in-out;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

.login-card .btn-primary {
  padding: 12px;
  font-size: 1rem;
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  border: none;
  box-shadow: 0 4px 15px rgba(37, 99, 235, 0.4);
}

.login-card .btn-primary:hover {
  background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.6);
  transform: translateY(-2px);
}

.login-card .btn-primary:active {
  transform: translateY(0);
}

/* ===== Password Toggle ===== */
.password-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.password-wrapper input {
  flex: 1;
  padding-right: 44px;
}

.toggle-password {
  position: absolute;
  right: 10px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  color: var(--text-muted);
  transition: color 0.2s;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
}

.toggle-password:hover {
  color: var(--primary-light);
}

.eye-icon {
  width: 18px;
  height: 18px;
  display: block;
  transition: opacity 0.15s;
}