:root {
            --primary-color: #4a6bff;
            --secondary-color: #6c63ff;
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .login-container {
            max-width: 450px;
            width: 100%;
            background: white;
            border-radius: 20px;
            padding: 50px 40px;
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
        }

        .login-header {
            text-align: center;
            margin-bottom: 40px;
        }

        .login-header h1 {
            color: var(--primary-color);
            font-weight: 700;
            font-size: 2rem;
            margin-bottom: 10px;
        }

        .login-header p {
            color: #666;
            margin: 0;
        }

        .form-control {
            border-radius: 10px;
            border: 2px solid #e0e0e0;
            padding: 12px 15px;
            font-size: 1rem;
        }

        .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.2rem rgba(74, 107, 255, 0.25);
        }

        .btn-login {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
            border: none;
            border-radius: 10px;
            padding: 14px;
            font-weight: 600;
            font-size: 1.1rem;
            width: 100%;
            color: white;
            transition: all 0.3s;
        }

        .btn-login:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(74, 107, 255, 0.4);
        }

        .btn-login:disabled {
            opacity: 0.6;
            cursor: not-allowed;
            transform: none;
        }

        .password-recovery {
            text-align: center;
            margin-top: 20px;
        }

        .password-recovery a {
            color: var(--primary-color);
            text-decoration: none;
            font-size: 0.9rem;
        }

        .password-recovery a:hover {
            text-decoration: underline;
        }

        footer {
            text-align: center;
            padding: 20px;
            color: #666;
            margin-top: 30px;
            font-size: 0.9rem;
        }

        .alert {
            border-radius: 10px;
            border: none;
        }

        .form-label {
            font-weight: 600;
            color: #333;
            margin-bottom: 8px;
        }

        /* Custom Checkbox Styles */
        .remember-me-container {
            display: flex;
            align-items: center;
            margin: 15px 0;
        }

        .custom-checkbox {
            position: relative;
            display: inline-block;
        }

        .custom-checkbox input[type="checkbox"] {
            opacity: 0;
            position: absolute;
            cursor: pointer;
        }

        .checkmark {
            display: inline-block;
            width: 20px;
            height: 20px;
            background-color: #ffffff;
            border: 2px solid #e0e0e0;
            border-radius: 5px;
            transition: all 0.3s ease;
            position: relative;
            cursor: pointer;
        }

        .custom-checkbox input[type="checkbox"]:checked~.checkmark {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
        }

        .checkmark:after {
            content: "";
            position: absolute;
            display: none;
            left: 6px;
            top: 2px;
            width: 5px;
            height: 10px;
            border: solid white;
            border-width: 0 2px 2px 0;
            transform: rotate(45deg);
        }

        .custom-checkbox input[type="checkbox"]:checked~.checkmark:after {
            display: block;
        }

        .checkbox-label {
            margin-left: 10px;
            color: #666;
            font-size: 0.95rem;
            cursor: pointer;
            user-select: none;
        }

        .custom-checkbox:hover .checkmark {
            border-color: var(--primary-color);
        }