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

 :root {
   /* Primary Colors */
   --primary-main: #2563eb;
   --primary-dark: #1d4ed8;
   --primary-light: #3b82f6;
   --primary-lighter: #60a5fa;
   --primary-gradient: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);

   /* Secondary Colors */
   --secondary-main: #64748b;
   --secondary-dark: #475569;
   --secondary-light: #94a3b8;
   --secondary-gradient: linear-gradient(135deg, #64748b 0%, #475569 100%);

   /* Success, Warning, Danger */
   --success-main: #059669;
   --success-dark: #047857;
   --success-light: #10b981;
   --warning-main: #d97706;
   --warning-dark: #b45309;
   --warning-light: #f59e0b;
   --danger-main: #dc2626;
   --danger-dark: #b91c1c;
   --danger-light: #ef4444;
   --info-main: #0891b2;

   /* Backgrounds Light */
   --bg-light: #f8fafc;
   --bg-white: #ffffff;
   --text-dark: #1e293b;
   --text-light: #64748b;
   --text-white: #ffffff;
   --text-muted: #94a3b8;
   --border-light: #e2e8f0;

   /* Shadows */
   --shadow-soft: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
     0 2px 4px -1px rgba(0, 0, 0, 0.06);
   --shadow-base: 0 1px 3px rgba(0, 0, 0, 0.1);
   --shadow-medium: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
     0 4px 6px -2px rgba(0, 0, 0, 0.05);
   --shadow-large: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
     0 10px 10px -5px rgba(0, 0, 0, 0.04);
   --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
   --shadow-primary: 0 10px 25px -5px rgba(37, 99, 235, 0.4);

   /* Transitions */
   --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
   --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
   --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

   /* Typography */
   --font-primary: "Cairo", sans-serif;
   --font-secondary: "Tajawal", sans-serif;
   --font-mono: "Courier New", monospace;

   /* Font Sizes */
   --font-xs: 12px;
   --font-sm: 14px;
   --font-base: 16px;
   --font-lg: 18px;
   --font-xl: 20px;
   --font-2xl: 24px;
   --font-3xl: 28px;
   --font-4xl: 32px;

   /* Font Weights */
   --font-light: 300;
   --font-regular: 400;
   --font-medium: 500;
   --font-semibold: 600;
   --font-bold: 700;

   /* Line Heights */
   --line-tight: 1.2;
   --line-normal: 1.5;
   --line-relaxed: 1.6;

   /* Spacing */
   --spacing-0: 0px;
   --spacing-1: 4px;
   --spacing-2: 8px;
   --spacing-3: 12px;
   --spacing-4: 16px;
   --spacing-5: 20px;
   --spacing-6: 24px;
   --spacing-8: 32px;
   --spacing-10: 40px;
   --spacing-12: 48px;

   /* Border Radius */
   --radius-none: 0px;
   --radius-sm: 6px;
   --radius-base: 8px;
   --radius-md: 10px;
   --radius-lg: 12px;
   --radius-xl: 16px;
   --radius-2xl: 20px;
   --radius-3xl: 24px;
   --radius-full: 9999px;
 }

 /* Dark Mode */
 html.dark {
   --bg-light: #0f172a;
   --bg-white: #1e293b;
   --text-dark: #f8fafc;
   --text-light: #cbd5e1;
   --text-muted: #94a3b8;
   --border-light: #334155;
 }

 html {
   scroll-behavior: smooth;
 }

 body {
   font-family: var(--font-primary);
   background-color: var(--bg-light);
   color: var(--text-dark);
   min-height: 100vh;
   display: flex;
   align-items: center;
   justify-content: center;
   transition: background-color var(--transition-normal),
     color var(--transition-normal);
   position: relative;
   overflow-x: hidden;
 }

 /* Theme Toggle */
 .theme-toggle {
   position: fixed;
   top: var(--spacing-5);
   left: var(--spacing-5);
   z-index: 1000;
 }

 .toggle-btn {
   width: 50px;
   height: 50px;
   border-radius: var(--radius-xl);
   background: var(--bg-white);
   border: 1px solid var(--border-light);
   color: var(--text-dark);
   cursor: pointer;
   display: flex;
   align-items: center;
   justify-content: center;
   font-size: var(--font-lg);
   transition: var(--transition-normal);
   box-shadow: var(--shadow-base);
 }

 .toggle-btn:hover {
   background: var(--primary-main);
   color: var(--text-white);
   box-shadow: var(--shadow-primary);
   transform: translateY(-2px);
 }

 /* Main Container */
 .login-wrapper {
   width: 100%;
   max-width: 450px;
   padding: var(--spacing-5);
   animation: slideInUp 0.6s ease;
 }

 @keyframes slideInUp {
   from {
     opacity: 0;
     transform: translateY(30px);
   }

   to {
     opacity: 1;
     transform: translateY(0);
   }
 }

 /* Login Card */
 .login-card {
   background-color: var(--bg-white);
   border: 1px solid var(--border-light);
   border-radius: var(--radius-2xl);
   padding: var(--spacing-10);
   box-shadow: var(--shadow-medium);
   transition: var(--transition-normal);
 }

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

 /* Header */
 .login-header {
   text-align: center;
   margin-bottom: var(--spacing-10);
 }

 .logo {
   width: 80px;
   height: 80px;
   margin: 0 auto var(--spacing-5);
   background: var(--primary-gradient);
   border-radius: var(--radius-2xl);
   display: flex;
   align-items: center;
   justify-content: center;
   box-shadow: var(--shadow-primary);
 }

 .logo i {
   font-size: 40px;
   color: var(--text-white);
 }

 .login-title {
   font-size: var(--font-3xl);
   font-weight: var(--font-bold);
   color: var(--text-dark);
   margin-bottom: var(--spacing-2);
 }

 .login-subtitle {
   font-size: var(--font-sm);
   color: var(--text-light);
   font-weight: var(--font-regular);
 }

 /* Form Section */
 .form-section {
   margin-bottom: var(--spacing-8);
 }

 .form-group {
   margin-bottom: var(--spacing-6);
 }

 .form-label {
   display: block;
   font-size: var(--font-sm);
   font-weight: var(--font-semibold);
   color: var(--text-dark);
   margin-bottom: var(--spacing-2);
 }

 .input-wrapper {
   position: relative;
 }

 .form-input {
   width: 100%;
   padding: var(--spacing-3) var(--spacing-4);
   padding-right: var(--spacing-10);
   border: 1px solid var(--border-light);
   border-radius: var(--radius-lg);
   font-size: var(--font-sm);
   font-family: var(--font-primary);
   background-color: var(--bg-white);
   color: var(--text-dark);
   transition: var(--transition-normal);
 }

 .form-input::placeholder {
   color: var(--text-muted);
 }

 .form-input:focus {
   outline: none;
   border-color: var(--primary-main);
   box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
 }

 .form-input:focus+.input-icon {
   color: var(--primary-main);
 }

 .input-icon {
   position: absolute;
   right: var(--spacing-4);
   top: 50%;
   transform: translateY(-50%);
   color: var(--text-muted);
   font-size: var(--font-base);
   transition: var(--transition-normal);
   pointer-events: none;
 }

  /* Login Actions (Remember Me & Forgot Password Row) */
  .login-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-4);
    margin-bottom: var(--spacing-6);
  }

  .login-actions .forgot-password {
    margin-top: 0;
    text-align: left;
  }

  .forgot-link {
    color: var(--primary-main);
    font-size: var(--font-xs);
    text-decoration: none;
    font-weight: var(--font-medium);
    transition: var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-1);
  }

  .forgot-link:hover {
    color: var(--primary-dark);
  }

  /* Custom Checkbox Styling for Remember Me */
  .remember-me-group {
    display: inline-flex;
    align-items: center;
  }

  .remember-label {
    display: flex;
    align-items: center;
    position: relative;
    cursor: pointer;
    font-size: var(--font-xs);
    font-weight: var(--font-medium);
    color: var(--text-light);
    user-select: none;
    padding-right: 24px; /* Space for checkmark in RTL */
    transition: color var(--transition-fast);
  }

  /* Hide default checkbox */
  .remember-label input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
  }

  /* Create custom checkmark */
  .checkmark {
    position: absolute;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    height: 16px;
    width: 16px;
    background-color: var(--bg-white);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
  }

  /* Hover style */
  .remember-label:hover input ~ .checkmark {
    border-color: var(--primary-light);
    background-color: rgba(37, 99, 235, 0.02);
  }

  .remember-label:hover {
    color: var(--text-dark);
  }

  /* Checked style */
  .remember-label input:checked ~ .checkmark {
    background-color: var(--primary-main);
    border-color: var(--primary-main);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
  }

  /* Create checkmark indicator */
  .checkmark::after {
    content: "";
    position: absolute;
    display: none;
    left: 4px;
    top: 1px;
    width: 4px;
    height: 7px;
    border: solid var(--text-white);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
  }

  /* Show indicator when checked */
  .remember-label input:checked ~ .checkmark::after {
    display: block;
  }

 /* Button Group */
 .button-group {
   display: grid;
   grid-template-columns: 1fr;
   gap: var(--spacing-3);
   margin-top: var(--spacing-8);
 }

 .btn {
   display: inline-flex;
   align-items: center;
   justify-content: center;
   gap: var(--spacing-2);
   padding: var(--spacing-3) var(--spacing-4);
   border: none;
   border-radius: var(--radius-lg);
   font-size: var(--font-sm);
   font-weight: var(--font-semibold);
   font-family: var(--font-primary);
   cursor: pointer;
   transition: var(--transition-normal);
   white-space: nowrap;
 }

 /* Button Primary */
 .btn-primary {
   background: var(--primary-gradient);
   color: var(--text-white);
   box-shadow: var(--shadow-primary);
 }

 .btn-primary:hover {
   transform: translateY(-2px);
   box-shadow: 0 12px 28px rgba(37, 99, 235, 0.4);
 }

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

 /* Button Secondary */
 .btn-secondary {
   background: transparent;
   color: var(--text-dark);
   border: 1px solid var(--border-light);
 }

 .btn-secondary:hover {
   background-color: var(--bg-light);
   border-color: var(--primary-main);
   color: var(--primary-main);
 }

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

 /* Divider */
 .divider {
   display: flex;
   align-items: center;
   gap: var(--spacing-4);
   margin: var(--spacing-8) 0;
 }

 .divider-line {
   flex: 1;
   height: 1px;
   background: var(--border-light);
 }

 .divider-text {
   font-size: var(--font-xs);
   color: var(--text-muted);
   font-weight: var(--font-medium);
 }

 /* Signup Section */
 .signup-section {
   padding-top: var(--spacing-6);
   border-top: 1px solid var(--border-light);
 }

 .signup-text {
   font-size: var(--font-sm);
   color: var(--text-light);
   margin-bottom: var(--spacing-4);
   text-align: center;
 }

 .role-buttons {
   display: grid;
   grid-template-columns: repeat(2, 1fr);
   gap: var(--spacing-3);
 }

 .role-btn {
   padding: var(--spacing-3) var(--spacing-4);
   border: 1px solid var(--border-light);
   border-radius: var(--radius-lg);
   background: var(--bg-white);
   color: var(--text-dark);
   font-size: var(--font-xs);
   font-weight: var(--font-medium);
   font-family: var(--font-primary);
   cursor: pointer;
   transition: var(--transition-normal);
   display: flex;
   flex-direction: column;
   align-items: center;
   justify-content: center;
   gap: var(--spacing-2);
   min-height: 80px;
 }

 .role-btn i {
   font-size: var(--font-xl);
 }

 .role-btn:hover {
   border-color: var(--primary-main);
   background: rgba(37, 99, 235, 0.05);
   color: var(--primary-main);
   transform: translateY(-2px);
   box-shadow: var(--shadow-soft);
 }

 /* Footer */
 .login-footer {
   text-align: center;
   margin-top: var(--spacing-8);
   padding-top: var(--spacing-6);
   border-top: 1px solid var(--border-light);
   font-size: var(--font-xs);
   color: var(--text-muted);
   line-height: var(--line-relaxed);
 }

 .login-footer a {
   color: var(--primary-main);
   text-decoration: none;
   font-weight: var(--font-medium);
 }

 .login-footer a:hover {
   text-decoration: underline;
 }

 /* Loading State */
 .btn.loading {
   position: relative;
   pointer-events: none;
   opacity: 0.8;
 }

 .btn.loading::after {
   content: "";
   display: inline-block;
   width: 14px;
   height: 14px;
   border: 2px solid rgba(255, 255, 255, 0.3);
   border-top-color: currentColor;
   border-radius: 50%;
   animation: spin 0.6s linear infinite;
 }

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

 /* Toast Styles */
 .toast-container {
   position: fixed;
   top: var(--spacing-5);
   right: var(--spacing-5);
   z-index: 10000;
   display: flex;
   flex-direction: column;
   gap: var(--spacing-3);
   max-width: 400px;
 }

 .toast {
   display: flex;
   align-items: center;
   gap: var(--spacing-3);
   padding: var(--spacing-4);
   background-color: var(--bg-white);
   border-radius: var(--radius-lg);
   box-shadow: var(--shadow-large);
   border-right: 4px solid;
   animation: slideInLeft 0.3s ease;
 }

 @keyframes slideInLeft {
   from {
     opacity: 0;
     transform: translateX(30px);
   }

   to {
     opacity: 1;
     transform: translateX(0);
   }
 }

 .toast.success {
   border-right-color: var(--success-main);
 }

 .toast.error {
   border-right-color: var(--danger-main);
 }

 .toast.warning {
   border-right-color: var(--warning-main);
 }

 .toast.info {
   border-right-color: var(--info-main);
 }

 .toast-icon {
   width: 40px;
   height: 40px;
   border-radius: var(--radius-md);
   display: flex;
   align-items: center;
   justify-content: center;
   font-size: var(--font-xl);
   flex-shrink: 0;
 }

 .toast.success .toast-icon {
   background: rgba(5, 150, 105, 0.1);
   color: var(--success-main);
 }

 .toast.error .toast-icon {
   background: rgba(220, 38, 38, 0.1);
   color: var(--danger-main);
 }

 .toast.warning .toast-icon {
   background: rgba(217, 119, 6, 0.1);
   color: var(--warning-main);
 }

 .toast.info .toast-icon {
   background: rgba(8, 145, 178, 0.1);
   color: var(--info-main);
 }

 .toast-content {
   flex: 1;
 }

 .toast-text {
   font-size: var(--font-sm);
   color: var(--text-dark);
   font-weight: var(--font-medium);
 }

 /* Responsive */
 @media (max-width: 768px) {
   .login-wrapper {
     max-width: 100%;
     padding: var(--spacing-4);
   }

   .login-card {
     padding: var(--spacing-6);
   }

   .login-title {
     font-size: var(--font-2xl);
   }

   .button-group {
     grid-template-columns: 1fr;
   }

   .role-buttons {
     grid-template-columns: 1fr;
   }

   .toggle-btn {
     top: var(--spacing-4);
     left: var(--spacing-4);
   }

   .toast-container {
     top: var(--spacing-4);
     right: var(--spacing-4);
     left: var(--spacing-4);
     max-width: none;
   }
 }

 @media (max-width: 480px) {
   .login-card {
     padding: var(--spacing-5);
   }

   .login-header {
     margin-bottom: var(--spacing-6);
   }

   .logo {
     width: 60px;
     height: 60px;
   }

   .logo i {
     font-size: 28px;
   }

   .login-title {
     font-size: var(--font-2xl);
   }

   .role-btn {
     font-size: var(--font-xs);
     padding: var(--spacing-2) var(--spacing-3);
     min-height: 70px;
   }
 }

 /* Alert Messages */
 .alert-error,
 .alert-success {
   display: flex;
   align-items: center;
   gap: var(--spacing-3);
   padding: var(--spacing-3) var(--spacing-4);
   border-radius: var(--radius-lg);
   font-size: var(--font-sm);
   font-weight: var(--font-medium);
   margin-bottom: var(--spacing-5);
   animation: fadeInDown 0.4s ease;
 }

 @keyframes fadeInDown {
   from {
     opacity: 0;
     transform: translateY(-8px);
   }

   to {
     opacity: 1;
     transform: translateY(0);
   }
 }

 .alert-error {
   background: rgba(220, 38, 38, 0.08);
   border: 1px solid rgba(220, 38, 38, 0.3);
   color: var(--danger-dark);
 }

 .alert-success {
   background: rgba(5, 150, 105, 0.08);
   border: 1px solid rgba(5, 150, 105, 0.3);
   color: var(--success-dark);
 }

 .alert-error i,
 .alert-success i {
   font-size: var(--font-lg);
   flex-shrink: 0;
 }