:root {
            --primary: #4361ee;
            --primary-dark: #3a0ca3;
            --secondary: #4895ef;
            --success: #4cc9f0;
            --danger: #f72585;
            --warning: #f8961e;
            --light: #f8f9fa;
            --dark: #212529;
            --gray: #6c757d;
            --border-radius: 12px;
            --box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Inter', sans-serif;
        }

        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
            min-height: 100vh;
            color: var(--dark);
        }

        /* Loader */
        .loader {
            position: fixed;
            top: 0;
            left: 0;

            width: 100%;
            height: 100%;
            background: rgba(255, 255, 255, 0.9);
            display: none;
            /* display: block; */
            justify-content: center;
            align-items: center;
            z-index: 9999;
        }

        .loader-spinner {
            width: 64px;
            height: 64px;
            margin-left: 45%;
            margin-top: 20%;
            border: 6px solid rgba(67, 97, 238, 0.2);
            border-radius: 50%;
            border-top-color: var(--primary);
            animation: spin 1s linear infinite;
        }

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

        /* Main Container */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem;
        }

        /* Header */
        .header {
            text-align: center;
            margin-bottom: 3rem;
        }

        .header h1 {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 0.5rem;
            background: linear-gradient(to right, #4361ee, #3a0ca3);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .header p {
            color: var(--gray);
            font-size: 1.1rem;
        }

        /* Button Styles */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.8rem 1.5rem;
            border-radius: var(--border-radius);
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            text-decoration: none;
            box-shadow: var(--box-shadow);
            margin: 0.5rem;
            min-width: 220px;
        }

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

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 15px 20px rgba(67, 97, 238, 0.2);
        }

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

        .btn-secondary:hover {
            background: #3a86ff;
            transform: translateY(-3px);
        }

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

        .btn-danger:hover {
            background: #d62a73;
            transform: translateY(-3px);
        }

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

        .btn-warning:hover {
            background: #e07e0c;
            transform: translateY(-3px);
        }

        /* Card Styles */
        .card {
            background: white;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            padding: 2rem;
            margin-bottom: 2rem;
            transition: var(--transition);
        }

        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
        }

        .card-title {
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
            color: var(--primary-dark);
            text-align: center;
        }

        /* Form Styles */
        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 500;
            color: var(--dark);
        }

        .form-control {
            width: 100%;
            padding: 0.8rem 1rem;
            border: 1px solid #e2e8f0;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
        }

        .form-control.invalid {
            border-color: var(--danger);
        }

        select.form-control {
            appearance: none;
            background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
            background-repeat: no-repeat;
            background-position: right 1rem center;
            background-size: 1rem;
        }

        textarea.form-control {
            min-height: 120px;
            resize: vertical;
        }

        /* Layouts */
        .grid {
            display: grid;
            gap: 1.5rem;
        }

        .grid-cols-2 {
            grid-template-columns: repeat(2, 1fr);
        }

        .flex-center {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            min-height: 80vh;
        }

        .btn-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1rem;
            margin-top: 2rem;
        }

        /* Toastr Customization */
        .toast {
            border-radius: var(--border-radius) !important;
            box-shadow: var(--box-shadow) !important;
            font-family: 'Inter', sans-serif !important;
        }

        .toast-success {
            background-color: var(--success) !important;
        }

        .toast-error {
            background-color: var(--danger) !important;
        }

        .toast-info {
            background-color: var(--secondary) !important;
        }

        .toast-warning {
            background-color: var(--warning) !important;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .grid-cols-2 {
                grid-template-columns: 1fr;
            }
            
            .btn {
                width: 100%;
            }
            
            .header h1 {
                font-size: 2rem;
            }
        }

        /* Animation Classes */
        .animate-in {
            animation: fadeInUp 0.5s ease-out;
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }


      
  /* Updated File Input Styles to match your theme */
  .file-input-container {
    position: relative;
    margin-bottom: 1.5rem;
  }

  .file-input-wrapper {
    display: flex;
    flex-direction: column;
  }

  .file-input-label {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 1rem;
    background: var(--primary);
    color: white;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    text-align: center;
    gap: 0.5rem;
  }

  .file-input-label:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
  }

  .file-input-label i {
    font-size: 1.2rem;
  }

  #img {
    position: absolute;
    left: 0;
    top: 0;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
  }

  .file-name {
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: var(--gray);
    padding: 0.25rem 0.5rem;
    background: rgba(0,0,0,0.03);
    border-radius: 4px;
    display: inline-block;
  }

  /* Additional improvements for form layout */
  .grid.grid-cols-2 {
    gap: 1.5rem;
  }

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

  /* Better spacing for the form */
  #studentForm {
    display: flex;
    /* margin-left: 20%; */
    /* justify-content: center; */
    /* align-items: center; */
    flex-direction: column;
    gap: 1rem;
  }


  #adminlogin{
    margin-left:30%;
  }