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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #2c2d28 0%, #2c2d28 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
        }
        
        .login-container {
            background: white;
            border-radius: 20px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
            max-width: 450px;
            width: 100%;
            overflow: hidden;
        }

        .login-header {
            background: #2c2d28;
            padding: 40px 30px;
            text-align: center;
            color: white;
        }

        .login-header img {
            max-width: 120px;
            margin-bottom: 20px;
            filter: brightness(0) invert(1);
        }

        .login-header h1 {
            font-size: 28px;
            margin-bottom: 10px;
        }

        .login-header p {
            opacity: 0.9;
            font-size: 14px;
        }

        .login-body {
            padding: 40px 30px;
        }

        .form-group {
            margin-bottom: 25px;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            color: #333;
            font-weight: 600;
            font-size: 14px;
        }

        .form-group input {
            width: 100%;
            padding: 14px 16px;
            border: 2px solid #e1e8ed;
            border-radius: 10px;
            font-size: 15px;
            transition: all 0.3s ease;
        }

        .form-group input:focus {
            outline: none;
            border-color: #2c2d28;
            box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
        }

        .password-wrapper {
            position: relative;
        }

        .toggle-password {
            position: absolute;
            right: 12px;
            top: 50%;
            transform: translateY(-50%);
            background: none;
            border: none;
            cursor: pointer;
            color: #2c2d28;
            font-size: 14px;
            padding: 4px 8px;
        }

        .remember-forgot {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 25px;
        }

        .remember-me {
            margin-right: 15px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .remember-me input[type="checkbox"] {
            width: auto;
            cursor: pointer;
        }

        .remember-me label {
            font-size: 14px;
            color: #666;
            cursor: pointer;
        }

        .forgot-password {
            color: #2c2d28;
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
        }

        .forgot-password:hover {
            text-decoration: underline;
        }

        .btn-login {
            width: 100%;
            padding: 16px;
            background: #2c2d28;
            color: white;
            border: none;
            border-radius: 10px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .btn-login:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
        }

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

        .divider {
            text-align: center;
            margin: 25px 0;
            color: #999;
            font-size: 14px;
            position: relative;
        }

        .divider::before,
        .divider::after {
            content: '';
            position: absolute;
            top: 50%;
            width: 42%;
            height: 1px;
            background: #e1e8ed;
        }

        .divider::before {
            left: 0;
        }

        .divider::after {
            right: 0;
        }

        .social-login {
            display: flex;
            gap: 12px;
        }

        .social-btn {
            flex: 1;
            padding: 12px;
            border: 2px solid #e1e8ed;
            background: white;
            border-radius: 10px;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 14px;
            font-weight: 500;
            color: #555;
        }

        .social-btn:hover {
            border-color: #2c2d28;
            color: #2c2d28;
            background: rgba(102, 126, 234, 0.05);
        }

        .register-link {
            text-align: center;
            margin-top: 25px;
            padding-top: 25px;
            border-top: 1px solid #e1e8ed;
            font-size: 14px;
            color: #666;
        }

        .register-link a {
            color: #2c2d28;
            text-decoration: none;
            font-weight: 600;
        }

        .register-link a:hover {
            text-decoration: underline;
        }

        .back-home {
            text-align: center;
            margin-top: 20px;
        }

        .back-home a {
            color: white;
            text-decoration: none;
            font-size: 14px;
            opacity: 0.9;
            transition: opacity 0.3s;
        }

        .back-home a:hover {
            opacity: 1;
            text-decoration: underline;
        }

        .error-message {
            color: #e74c3c;
            font-size: 13px;
            margin-top: 8px;
            display: none;
        }

        .input-error {
            border-color: #e74c3c !important;
        }

        @media (max-width: 480px) {
            .login-container {
                margin: 0 10px;
            }

            .login-header {
                padding: 30px 20px;
            }

            .login-body {
                padding: 30px 20px;
            }

            .social-login {
                flex-direction: column;
            }
        }