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

        :root {
            --blue-grey-50: #eceff1;
            --blue-grey-100: #cfd8dc; 
            --blue-grey-200: #b0bec5;
            --blue-grey-300: #90a4ae;
            --blue-grey-400: #78909c;
            --blue-grey-500: #607d8b;
            --blue-grey-600: #546e7a;
            --blue-grey-700: #455a64;
            --blue-grey-800: #37474f;
            --blue-grey-900: #263238;
            --sidebar-width: 280px;
            --header-height: 60px;
        }

        body {
            font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
            background-color: var(--blue-grey-50);
            color: var(--blue-grey-800);
            line-height: 1.6;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }

        .login-container {
            background: white;
            border-radius: 12px;
            padding: 40px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            border-left: 4px solid var(--blue-grey-500);
            width: 100%;
            max-width: 450px;
        }

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

        .login-header .logo {
            font-size: 2rem;
            font-weight: bold;
            color: var(--blue-grey-600);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            margin-bottom: 10px;
        }

        .login-header h1 {
            color: var(--blue-grey-800);
            font-size: 28px;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .login-header p {
            color: var(--blue-grey-600);
            font-size: 16px;
        }

        .login-form {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .form-group {
            display: flex;
            flex-direction: column;
        }

        .form-group label {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--blue-grey-700);
            font-size: 0.8rem;
        }

        .form-group label i {
            font-size: 16px;
            color: var(--blue-grey-600);
            width: 16px;
        }

        .input-wrapper {
            position: relative;
        }

        .form-group input {
            width: 100%;
            padding: 12px 16px;
            padding-left: 45px;
            border: 2px solid var(--blue-grey-200);
            border-radius: 8px;
            background: var(--blue-grey-50);
            color: var(--blue-grey-800);
            font-size: 16px;
            transition: all 0.3s ease;
        }

        .form-group input:focus {
            outline: none;
            border-color: var(--blue-grey-500);
            background: white;
            box-shadow: 0 0 0 3px rgba(96, 125, 139, 0.1);
        }

        .input-icon {
            position: absolute;
            left: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--blue-grey-400);
            font-size: 16px;
            pointer-events: none;
        }

        .submit-btn {
            background: linear-gradient(135deg, var(--blue-grey-600), var(--blue-grey-700));
            color: white;
            border: none;
            padding: 14px 20px;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-top: 10px;
        }

        .submit-btn:hover {
            background: linear-gradient(135deg, var(--blue-grey-700), var(--blue-grey-800));
            transform: translateY(-2px);
            box-shadow: 0 4px 15px rgba(96, 125, 139, 0.3);
        }

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

        .form-footer {
            text-align: center;
            margin-top: 25px;
            padding-top: 20px;
            border-top: 1px solid var(--blue-grey-200);
        }

        .form-footer p {
            color: var(--blue-grey-600);
            font-size: 14px;
        }

        .form-footer a {
            color: var(--blue-grey-600);
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s ease;
        }

        .form-footer a:hover {
            color: var(--blue-grey-800);
        }

        /* Security notice */
        .security-notice {
            background: var(--blue-grey-50);
            border: 1px solid var(--blue-grey-200);
            border-radius: 6px;
            padding: 12px;
            margin-top: 20px;
            display: flex;
            align-items: flex-start;
            gap: 10px;
        }

        .security-notice i {
            color: var(--blue-grey-600);
            font-size: 16px;
            margin-top: 2px;
        }

        .security-notice p {
            color: var(--blue-grey-600);
            font-size: 13px;
            line-height: 1.4;
        }

        /* Responsive design */
        @media (max-width: 480px) {
            body {
                padding: 15px;
            }

            .login-container {
                padding: 30px 25px;
            }

            .login-header .logo {
                font-size: 1.8rem;
            }

            .login-header h1 {
                font-size: 24px;
            }

            .form-group input {
                padding: 10px 14px;
                padding-left: 40px;
                font-size: 15px;
            }

            .submit-btn {
                padding: 12px 18px;
                font-size: 15px;
            }
        }

        /* Animation for form appearance */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .login-container {
            animation: fadeInUp 0.6s ease-out;
        }

        /* Input validation styles */
        .form-group input:invalid {
            border-color: #e57373;
        }

        .form-group input:valid {
            border-color: var(--blue-grey-300);
        }

        /* Loading state for submit button */
        .submit-btn:disabled {
            opacity: 0.7;
            cursor: not-allowed;
            transform: none;
        }

        .submit-btn:disabled:hover {
            transform: none;
            box-shadow: none;
        }
		
		.d-flex {
			display: flex;
			justify-content: space-between;
			align-items: center;
		}
		.mb-0 {
			margin-bottom: 0;
		}