* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        
        :root {
            --opal-blue: #2a6eb8;
            --opal-blue-dark: #1d5a9c;
            --opal-blue-light: #4a8fd8;
            --light: #f8f9fa;
            --dark: #212529;
            --gray: #6c757d;
            --error: #f72585;
            --border-radius: 12px;
            --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        
        body {
            background: linear-gradient(135deg, #f5f7fa 0%, #e3e9f5 100%);
            min-height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
        }
        
        .login-container {
            width: 100%;
            max-width: 420px;
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            overflow: hidden;
            padding: 40px 35px;
        }
        
        /* OPAL Logo */
        .opal-logo {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            margin-bottom: 30px;
        }
        
        .opal-logo-icon {
            font-size: 42px;
            margin-bottom: 12px;
            color: var(--opal-blue);
            background: linear-gradient(to right, var(--opal-blue), var(--opal-blue-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        
        .opal-logo-text {
            font-size: 32px;
            font-weight: 800;
            letter-spacing: 1px;
            margin-bottom: 4px;
            background: linear-gradient(to right, var(--opal-blue), var(--opal-blue-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        
        .opal-logo-subtitle {
            font-size: 14px;
            font-weight: 500;
            color: var(--gray);
            letter-spacing: 0.5px;
        }
        
        .login-header {
            margin-bottom: 30px;
            text-align: center;
        }
        
        .login-header h2 {
            font-size: 24px;
            color: var(--dark);
            margin-bottom: 8px;
        }
        
        .login-header p {
            color: var(--gray);
            font-size: 14px;
        }
        
        .login-form {
            width: 100%;
        }
        
        .form-group {
            margin-bottom: 20px;
            position: relative;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: var(--dark);
            font-size: 14px;
        }
        
        .input-with-icon {
            position: relative;
        }
        
        .input-with-icon i:first-child {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--gray);
            font-size: 18px;
            z-index: 1;
        }
        
        .input-with-icon input {
            width: 100%;
            padding: 16px 50px 16px 48px;
            border: 1px solid #e0e0e0;
            border-radius: var(--border-radius);
            font-size: 16px;
            transition: var(--transition);
            background-color: #fcfcfc;
        }
        
        .input-with-icon input:focus {
            outline: none;
            border-color: var(--opal-blue);
            box-shadow: 0 0 0 3px rgba(42, 110, 184, 0.1);
            background-color: white;
        }
        
        .password-toggle {
            position: absolute;
            right: 16px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            color: var(--gray);
            cursor: pointer;
            font-size: 18px;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
            z-index: 2;
            padding: 0;
        }
        
        .password-toggle:hover {
            color: var(--opal-blue);
        }
        
        .remember-forgot {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 25px;
            font-size: 14px;
        }
        
        .remember-me {
            display: flex;
            align-items: center;
        }
        
        .remember-me input {
            margin-right: 8px;
            accent-color: var(--opal-blue);
        }
        
        .forgot-password {
            color: var(--opal-blue);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
        }
        
        .forgot-password:hover {
            color: var(--opal-blue-dark);
            text-decoration: underline;
        }
        
        .submit-btn {
            width: 100%;
            padding: 16px;
            background: linear-gradient(to right, var(--opal-blue), var(--opal-blue-light));
            color: white;
            border: none;
            border-radius: var(--border-radius);
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            margin-bottom: 25px;
        }
        
        .submit-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 7px 20px rgba(42, 110, 184, 0.3);
        }
        
        .submit-btn:active {
            transform: translateY(0);
        }
        
        .divider {
            text-align: center;
            position: relative;
            margin: 25px 0;
            color: var(--gray);
            font-size: 13px;
        }
        
        .divider::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 0;
            right: 0;
            height: 1px;
            background-color: #eee;
        }
        
        .divider span {
            background-color: white;
            padding: 0 15px;
            position: relative;
        }
        
        .social-login {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-bottom: 25px;
        }
        
        .social-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background-color: #f5f5f5;
            color: var(--dark);
            border: 1px solid #e0e0e0;
            font-size: 16px;
            cursor: pointer;
            transition: var(--transition);
        }
        
        .social-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
        }
        
        .google:hover {
            background-color: #db4437;
            color: white;
            border-color: #db4437;
        }
        
        .facebook:hover {
            background-color: #4267B2;
            color: white;
            border-color: #4267B2;
        }
        
        .twitter:hover {
            background-color: #1da1f2;
            color: white;
            border-color: #1da1f2;
        }
        
        .signup-link {
            text-align: center;
            font-size: 14px;
            color: var(--gray);
        }
        
        .signup-link a {
            color: var(--opal-blue);
            text-decoration: none;
            font-weight: 600;
            transition: var(--transition);
        }
        
        .signup-link a:hover {
            text-decoration: underline;
        }
        
        .error-message {
            color: var(--error);
            font-size: 13px;
            margin-top: 6px;
            display: none;
        }
        
        .success-message {
            background-color: rgba(42, 110, 184, 0.1);
            color: var(--opal-blue);
            padding: 12px 16px;
            border-radius: 8px;
            margin-bottom: 20px;
            display: none;
            font-size: 14px;
            border-left: 4px solid var(--opal-blue);
        }
        
        /* Responsive Design */
        @media (max-width: 480px) {
            .login-container {
                padding: 30px 25px;
                max-width: 380px;
            }
            
            .remember-forgot {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            
            .opal-logo-text {
                font-size: 28px;
            }
            
            .opal-logo-subtitle {
                font-size: 13px;
            }
            
            .input-with-icon input {
                padding: 14px 46px 14px 44px;
                font-size: 15px;
            }
        }
        
        /* Animation for form */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .login-container {
            animation: fadeIn 0.6s ease-out;
        }